2021 Audi A6

2021 sits inside the C8 generation (2019–2024) but is not a pure carry-over year: Audi raised the 45 TFSI's 2.0L turbo four from 248 hp to 261 hp for MY2021, announced alongside a new entry Sport 45 TFSI trim. The volume US configuration is a 45 TFSI quattro, whose 261 hp is a mid-pack entry output for a mid-size luxury sedan.

The 2.0T's 273 lb-ft is unchanged by the 2021 power bump and arrives from 1,600 rpm, so the A6 pulls willingly in ordinary driving. The peak figure is nonetheless unremarkable next to six-cylinder rivals and next to the V6 A6 one option box away.

Standard quattro traction and the dual-clutch's launch get the four-cylinder A6 to 60 mph in a published 6.1 seconds — respectable for a ~4,100-lb sedan, but a clear step behind the V6 car's 5.1 s and behind six-cylinder rivals. Confidence is MEDIUM because Audi did not restate the acceleration claim when it added the 13 hp, so 2021 sources still quote the 248-hp car's 6.1 s while later listings for the identical 261-hp powertrain quote 5.8 s; the honest spread is 5.8–6.1 s.

The 2.0T with 12V mild-hybrid assist is quiet and smooth at cruise and the MHEV system masks stop-start restarts well, and the 2021 power increase sharpens mid-range response. But the four-cylinder is repeatedly described as adequate rather than luxurious in a car this size, and the C8's hesitation from a standstill is a well-documented trait of this drivetrain — upper-middle band, not the top one.

The seven-speed S tronic dual-clutch shifts crisply once underway, holds a tall top gear for cruising and does not hunt at speed, but its low-speed manners are this powertrain's most-cited complaint — jerky 1–2 shifts, hesitation from rest and shudder during parking maneuvers are characteristic of the DL382 unit in the C8.

Every US 2021 A6 is a quattro — there is no front- or rear-drive version at any trim or engine, so all-wheel drive is standard rather than an upcharge. The 45 TFSI uses quattro with ultra technology (on-demand rear axle for efficiency), the V6 the permanent self-locking centre-differential system. No low range or terrain modes, which is right for a sedan but caps the score below the ceiling.

US buyers get two distinct mild-hybrid gas engines — the 261-hp 2.0T 45 TFSI and the 335-hp 3.0T V6 55 TFSI — plus the separately badged S6 above them, which covers mainstream needs but offers nothing that plugs in. Audi did federalise a PHEV for 2021 (the Q5 55 TFSI e), so the absence is a choice about this model line rather than a brand-wide gap; a 2021 BMW 5 Series buyer could have a 530e and an A6 buyer could not.

EPA rates the 2021 A6 quattro with the 2.0L turbo four at 26 MPG combined — a fair figure for a standard-AWD luxury sedan carrying about 4,100 lb, but short of hybridised rivals such as the Lexus ES 300h, because the 48V mild-hybrid system recovers energy and extends stop-start without ever moving the car on electricity.

23 MPG city is respectable for a permanently all-wheel-drive sedan of this weight — the 48V mild hybrid widens the stop-start window and allows brief engine-off coasting — but it is well short of what a full hybrid returns in stop-and-go traffic, and it is the weakest of the A6's three EPA numbers relative to its segment band.

31 MPG highway reflects the C8's slippery bodywork and a tall seventh gear, and is comfortably the strongest of the A6's three EPA figures. It is one MPG below the 2022 rating of the mechanically identical car, and two clear of the far more powerful V6.

A 19.3-gallon tank at 26 MPG combined gives roughly 502 miles of mixed-driving range — genuine touring capability that softens the premium-fuel bill on long trips, and close to 600 miles if held at the highway rating. Confidence is MEDIUM because EPA publishes no range figure for gasoline vehicles and some aggregators list the C8's tank as 19.0 rather than 19.3 gallons (a ~494–502 mi spread on the combined figure).

EPA puts the running cost at $2,900 a year on its standard 15,000-mile, 55/45 city-highway assumptions. Decent MPG cannot rescue the figure because it is computed at premium-grade pricing, which is exactly where the A6 loses ground to mainstream sedans returning similar economy on regular unleaded.

Both US A6 engines require premium unleaded (91 AKI) rather than merely recommending it, adding roughly 40–60¢ a gallon over regular for the life of the car. With no diesel, flex-fuel, hybrid or plug-in A6 offered in the US for 2021, there is no configuration a buyer can pick that lowers the energy bill.

NHTSA tested the 2021 A6 sedan directly and returned the maximum 5-star overall rating, with 5 stars in the side barrier and side pole tests and a 5-star rollover result. Only the combined frontal figure drops to 4 stars, pulled down by the 4-star passenger side.

The 2021 A6 sedan is an IIHS TOP SAFETY PICK+ with Good in all six crashworthiness evaluations — driver- and passenger-side small overlap front, moderate overlap front, side, roof strength and head restraints/seats. Held just short of the ceiling because the clean sweep is against the 2021-era test set: the C8 was never run through the updated side or updated moderate overlap protocols that later model years face.

2021 is the year Audi closed the biggest gap: Adaptive Cruise Assist with Audi active lane assist became standard on Premium Plus rather than a $1,750 package, so the volume trim now ships all five core assists — AEB, ACC, lane centering, side assist blind-spot and rear cross-traffic — as standard. The base Premium ($55,895) still gets only Audi pre sense front, lane departure warning, auto high beams and front/rear parking sensors, with blind-spot and ACC unavailable at that trim, which keeps it out of the top band.

Audi pre sense front earned IIHS Superior in both front crash prevention evaluations available for 2021 — vehicle-to-vehicle, avoiding the collision outright at 12 and 25 mph, and daytime pedestrian across the crossing-child, crossing-adult and parallel-adult scenarios. Scored just below the top of the band because IIHS had no nighttime pedestrian protocol in 2021, so the night capability the ceiling asks for is unmeasured rather than demonstrated.

Audi side assist is comprehensive in content — mirror-mounted blind-spot warning, rear cross-traffic assist and a vehicle exit warning that flags approaching cyclists and traffic before a door opens — and it is standard from Premium Plus up, i.e. on the volume trim. It sits mid-band rather than high because the coverage is alert-only with no steering or braking intervention, and the base Premium has to buy it.

Lane departure warning is standard on every 2021 A6, and Audi active lane assist with true lane centering became standard rather than optional on Premium Plus this year, drawing on the C8's dense sensor set. Reviewers rate the centering steady and free of ping-ponging on well-marked highways, but it asks for regular steering torque and gives up sooner on faded markings than the best systems of the era, and the base Premium still gets warning only.

Adaptive Cruise Assist is one of the better-integrated highway systems of its generation — full-speed-range ACC from 0 to 95 mph with stop-and-go, fused with lane centering and traffic jam assist so longitudinal and lateral control behave as one system. Scored above the 2020 car because for 2021 it is standard equipment on the volume Premium Plus rather than a $1,750 option; it stays out of the top band only because the base Premium cannot get it at all.

Audi offered no hands-free highway driving on the 2021 A6 in the US. Adaptive Cruise Assist and Traffic Jam Assist are explicitly hands-on systems requiring continuous steering-wheel contact, and the Level 3 Traffic Jam Pilot developed for the A8 was never homologated for the US market, let alone offered on the A6 — nothing comparable to Super Cruise, BlueCruise or ProPILOT Assist 2.0 at any trim or price.

IIHS rates the 2021 A6's headlights Good on Premium Plus and Prestige — covering the volume trim — while the base Premium's LED projector units rate only Acceptable. That split is exactly what the middle band describes, so it scores at the top of that band rather than in the Good-across-the-range band; automatic high beams are standard on every trim.

Typical modern executive-sedan sightlines — a clear forward view over a low cowl and a relatively low window beltline, but a rising rear glass line and thick C-pillars that leave real over-the-shoulder blind zones. Camera compensation improved for 2021: front and rear parking sensors and a rearview camera are standard everywhere, the top view camera with virtual 360 view is standard from Premium Plus, and it became orderable on the base Premium through the Convenience package.

IIHS rates the 2021 A6's LATCH ease of use Good — its top rating — with two outboard positions carrying complete lower-anchor hardware plus top tethers, and a genuinely adult-sized rear bench at 37.4 inches of legroom. It sits in the upper mid band rather than the top because there are no lower anchors in the center position and mid-size sedan bench width makes three seats abreast a squeeze rather than the easy 3-across the top band describes.

2021 is a mid-cycle year of the C8 generation (2019–2024) and the body carries over unchanged, so every US A6 sedan seats five — the $54,900 Premium 45 TFSI, the new-for-2021 Sport 45 TFSI and the 55 TFSI V6 alike. Quattro is standard across the range, so the transmission tunnel leaves the centre rear position a short-trip seat in practice.

38.0 in sits exactly mid-band for a sedan. The panoramic glass roof is standard equipment on the 2021 A6 right down to the $55,945 Premium, so 38.0 in is the figure every buyer actually gets rather than a sunroof-reduced number.

41.3 in lands in the lower third of the mid-size sedan band — a C8 packaging trait rather than anything specific to 2021. Nearly 58 in of front shoulder room makes the cabin feel wider than the legroom figure suggests, but seat travel is only adequate for very tall drivers.

38.1 in of rear headroom sits in the upper part of the sedan band and is a tenth more than the front figure — the C8 roofline holds its height over the second row before it drops. It clears six-footers in back and is the strongest of the A6's five passenger-space specs.

37.4 in on a 115.1 in wheelbase is mid-pack for the class — comfortable for two adults in back, tight for three — and slightly ahead of the 2021 BMW 5 Series and Mercedes-Benz E-Class without approaching the rear sprawl of a Genesis G80.

13.7 cu ft is a little below the mid-size sedan average and is the binding constraint on the A6's family and road-trip missions. The space is unusually usable for its size thanks to a low lift-over lip and a deep floor, and the 40/20/40 split seatback with a centre ski pass-through extends it for long items.

Competent and conventional rather than clever: usable door bins, a lidded console cubby, a covered front tray and the 40/20/40 rear seatback with a pass-through, but small-item storage in the console and door bins is reviewed as limited. There is no underfloor bin, no reconfigurable console and no onboard household power, and the lower 8.6 in MMI display eats console real estate rivals give over to storage.

A genuine C8 strength confirmed by Consumer Reports' own 2021 road test, which found both rows 'comfortable and supportive, even for long trips.' Heated eight-way power front seats with four-way lumbar adjustment and leather are standard on the base Premium, so the seats a typical 2021 buyer gets are well equipped as well as well shaped; ventilated fronts and 18-way massage seats need the Premium Plus Executive package or a Prestige.

Composed but firm, and Consumer Reports names the firmness as one of the specific reasons the 2021 A6 misses top honours in the class — 'taut and steady' with good pothole absorption, but road texture is transmitted noticeably into the cabin. The volume Premium runs steel springs on 19-inch all-season tyres, newly standard for 2021; the Black optic sport package, extended to all trims for 2021, swaps in a sport suspension and 20-inch wheels that make small bumps intrude.

Wind and road noise are well contained, but Consumer Reports' 2021 test singles out the volume 45 TFSI's four-cylinder as noticeable and 'less polished' than the V6 — exactly the powertrain the typical 2021 buyer gets. That, plus acoustic side glass being reserved for the upper trims, is what keeps it short of the segment's quietest cars.

A rich standard set at the entry point — three-zone automatic climate with rear vents, heated eight-way power front seats, leather, panoramic sunroof and ambient lighting on the $55,945 Premium — and unusually good availability above it for this generation: the $2,250 Executive package on the four-cylinder Premium Plus adds four-zone climate, ventilated front seats and heated rear seats, which in 2022 became a Prestige-only (and therefore V6-only) proposition. Prestige also gained a standard power rear sunshade and manual side sunshades for 2021.

The entry 2021 A6 is the 248-hp 45 TFSI Premium at $54,900 before destination, and quattro AWD is standard on every A6 where the 2021 BMW 530i and Mercedes E 350 still listed rear-drive base cars. That delivered figure sits well above the ceiling of the $22k-$55k sedan normalization band, so it scores zero — the band grades all sedans on one absolute scale rather than against luxury peers.

Premium Plus is the volume A6 trim and the 248-hp 45 TFSI is the volume engine — it is where the 16-speaker Bang & Olufsen 3D audio, head-up display and, new for 2021, standard Adaptive Cruise Assist with Audi active lane assist live, and KBB publishes its 2021 A6 valuations around the 45 TFSI Premium Plus. Adding metallic paint and one common pack puts real orders near $61,000, $500 under the equivalent 2022 car.

Nothing is included on a 2021 A6 — Audi Care is a prepaid plan bought on top of the car and Audi Signature Care's included service did not arrive until MY2026 — so the owner pays from the first 10,000-mile service, and year 5 falls entirely outside the 4 yr/50,000 mi warranty. The figure steps a little above the 2022 and 2023 cars on the same drivetrains because this car's five-year window (2021-2026) opened earliest into the parts and dealer-labor inflation that followed, and it is the one year of the three whose window is now complete rather than projected.

The 2021 model year reaches five years old in 2026, so this is observed rather than forecast: 2021 A6s list nationally around $26,900, about 45% of the ≈$61,000 volume-trim sticker on an asking-price basis and less once retail asking is discounted to real transaction and private-party value. iSeeCars measures 44.4% retention on this exact C8 generation against a 53.6% luxury-midsize class average — the A6 depreciates roughly nine points harder than its own segment, which is the single biggest driver of this category's score.

Audi's 4 yr/50,000 mi bumper-to-bumper matched BMW and Mercedes for 2021 and beats the 3 yr/36,000 mi mainstream standard, but trails Genesis and Jaguar at 5 yr/60,000 mi. Mid-band for the segment and unchanged for MY2021.

Audi dropped its separate, longer powertrain warranty from MY2020, so the 248-hp 2.0T 45 TFSI or 335-hp 3.0T V6 55 TFSI, its 48-volt mild-hybrid hardware and the quattro driveline in a 2021 A6 are covered for exactly as long as the trim panels. That falls below the floor of the 5-10 year band this item normalizes against and is a fraction of the 10-year powertrain coverage from Hyundai, Kia and Genesis — the A6's weakest ownership metric.

No complimentary scheduled maintenance at all on a 2021 A6 — Audi Care is a prepaid plan covering the 10,000-to-40,000-mile services for roughly $699-$1,179 depending on model, and Audi Signature Care's included 3 yr/30,000 mi service did not arrive until MY2026. What is included is 4 years of unlimited-mileage Audi 24-Hour Roadside Assistance running alongside the warranty plus short Audi connect trials, and MY2021 added a standard integrated toll module and advanced key on Premium — convenience content, not cost relief. The owner pays from the very first service, behind the included-maintenance programs Genesis, Volvo, Jaguar and BMW's then-current Ultimate Care offered in this segment for 2021.

$61,000 volume-trim price minus its estimated resale value after 5 years (44% retained, or about $26,840) leaves about $34,160 in depreciation. Add the projected $8,400 in 5-year maintenance and repairs, and owning this vehicle for 5 years costs about $42,560 in total.

The two model-level forecasts are the most favorable of any C8 model year — Consumer Reports calls the 2021 A6 'more reliable than other cars from the same model year' (a stronger verdict than the 'about average' it gives 2020 and 2022) and J.D. Power's predicted-reliability score of 69/100 beats the 2022 car's 63 — but both sit on thin data, with every CR trouble-spot row reading NA and J.D. Power still classifying 69 as Fair, below average, and the lowest in the class. The realized field result pulls the other way: the dependability study covering exactly these cars at three years put Audi 85 PP100 above the industry average, and NHTSA carries 15 owner complaints for this model year including an engine seizure after overheating and a complete loss of drive. Scored just below the 2022 car on that split.

Both year-exact study endpoints place Audi 31st of 32 brands, and the deficits are the widest recorded for any A6 model year: 240 PP100 against a 162 average at 90 days, then 275 against 190 at three years — gaps of 78 and 85 points, against 59 and 71 for 2022-model-year cars. At three years Audi came in worse than Land Rover and was beaten by every brand except Chrysler. Scored at the bottom of the range used for adjacent A6 years because this is the worst of the set on both measures; it stays off the floor only because the problem mix is weighted toward infotainment and connectivity rather than mechanical failure.

Eleven campaigns are listed against this model year and ten name the A6 Sedan — the highest count of the entire C8 run, against nine for 2020, five for 2022 and one for 2023. Severity is the larger problem: an incorrectly manufactured passenger airbag score line that may not deploy properly and could eject plastic debris, a rear-axle lock nut that can break and misalign the axle causing loss of control, a mislabeled brake fluid cap that can reduce braking ability, a fuel level sender that can stall the engine, a gateway module that suddenly reduces engine power if liquid is spilled in the rear seat, and a software fault that blanks the instrument cluster. That is the 'major or repeated recalls' band on both counts. Held marginally above the 2020 car only because 2021 escapes the starter-generator fire recall, which covered 2019-2020 exclusively.

2021 is a change year rather than a carry-over for the volume 45 TFSI: the 2.0L turbo four was uprated from 248 to 261 hp with a revised engine, so this model year runs a first-year version of the powertrain in this application, mated to the long-serving DL382 seven-speed wet-clutch S tronic and quattro ultra. The underlying EA888 2.0T and that transmission both have high-mileage track records and neither carries the dry-clutch DQ200's reputation, and 2021 escapes the belt-starter-generator fire recall that hit 2019-2020 cars. Pulled to the middle of the band by real field reports on this exact year — an engine that overheated and seized, a thermostat housing and oil cooler bracket leaking coolant at 56,000 miles, and a complete loss of drive with a transmission warning — plus the family's standing maintenance liabilities.

The C8 cabin is this car's outright strength and reviewers put it at or above the German benchmark — soft leather, genuine wood and metal trim, and switchgear that feels substantial for the money. 2021 sits early enough in the generation that the design was still current rather than aging behind BMW and Mercedes, and the model year upgraded the materials directly: Fine Grain Ash inlays replaced walnut and the dual-screen MMI became standard across the line. Just short of the very top band because the gloss-black trim and twin haptic screens are persistent fingerprint magnets.

Physical assembly out of Neckarsulm reads as a strength — reviewers and owners single out consistent panel gaps and a notably quiet, rattle-free cabin — but this item's guidance names initial-quality reports explicitly, and the study covering exactly these cars at 90 days placed Audi 78 PP100 above the industry average and 31st of 32 brands, the widest deficit of any A6 model year. Scored below the 2022 car on that gap and on a non-empty owner-complaint record that includes a spontaneously shattered sunroof and a persistent mold odor from the HVAC system. It stays in the upper-middle band because that year's IQS deficit was driven industry-wide by infotainment and wireless-connectivity faults rather than build defects.

Audi runs the smallest US retail network of the German three — roughly 314 stores against BMW's 370 and Mercedes-Benz's 387 — which leaves thinner coverage outside metro areas for a car whose problem profile is software- and electronics-heavy and therefore dealer-dependent. Service satisfaction is adequate rather than distinguishing, with Audi absent from the premium leaders in J.D. Power's customer service index, and this model year's own complaint record contains two specific service failures: a recall remedy part that was unavailable, and a refused reimbursement.

Out of warranty this is an expensive car to keep, and a 2021 A6 is now well clear of the 4yr/50,000-mile coverage on both time and mileage, so the mild-hybrid starter generator, DCT service, gateway and MMI electronics, the coolant-circuit failures this year's owners actually report, and any carbon cleaning all fall on the owner at dealer rates. RepairPal's quattro entry — the only configuration sold here — runs $1,056 a year against $652 for all vehicles, with 1.1 unscheduled shop visits per year against 0.8 for the class. Component protection on the MMI radio control unit means replacement modules need dealer coding, which shuts out much of the independent and used-part supply that would otherwise soften the cost.

This is the single biggest technology difference between the 2021 A6 and the 2022 car: for 2021 the volume Premium still carries the 8.8-inch upper display, and the 10.1-inch MMI Navigation High was newly added to the optional Convenience package for this model year rather than being standard. The item measures the centre screen on the volume trim, so 8.8 in is the honest figure even though the A6 carries two screens.

Consumer Reports' 2021 road test found the dual touchscreens 'quite logical to use,' responding quickly with well-organised icons and buttons — the MIB3 hardware is genuinely fast. The cost is that climate and most convenience functions live on the lower haptic screen, so the A6 asks the driver to look down for adjustments a knob would handle, and the volume Premium works through the smaller 8.8-inch upper display.

The Audi smartphone interface is standard on every 2021 A6 and Consumer Reports confirms wireless Apple CarPlay on the car it tested, so half the equation is standard and cable-free. Android Auto in 2021 is wired only — Audi did not extend wireless Android Auto to the A6 until the MY2022 software rollout — which is exactly the 'wired standard / wireless partial' middle of this band.

MMI Navigation plus is standard on every 2021 A6 rather than optional — cloud-assisted destination search, Google Earth satellite imagery and 3-D city maps with Audi connect PRIME — alongside the 'Hey Audi' natural-language assistant. It scores a notch below the 2022 car because built-in Amazon Alexa and the myAudi user profiles arrived with the MY2022 software update, and the assistant still fumbles free-form requests badly enough that most owners default to phone projection.

The 16-speaker Bang & Olufsen 3D Premium Sound system is a genuinely excellent upgrade and comes standard from the Premium Plus rather than being reserved for the top trim, with the 19-speaker B&O 3D Advanced system available above it. The 10-speaker system on the base Premium — the trim most 2021 buyers actually take — is merely competent, which keeps this out of the top band.

The 12.3-inch second-generation Audi virtual cockpit is an excellent display, but on the 2021 A6 it is optional rather than standard: the volume Premium ships with a 7-inch colour driver-information display between conventional gauges, and reaching the full-digital cluster costs the $1,500 Convenience package or a step to Premium Plus. Making virtual cockpit plus standard on the Premium was a MY2022 change — this item scores availability, and in 2021 the base car does not have it.

The C8's MIB3 head unit takes over-the-air map and infotainment content updates through the embedded Audi connect modem, but vehicle control software still requires a dealer visit and Audi's whole-vehicle OTA programme in this period covered its e-tron models only. That is the infotainment/maps-only middle of the band, and 2021 sits a shade below 2022 because the feature-adding software rollout that year demonstrated the channel in a way nothing did for MY2021.

myAudi with Audi connect PRIME covers remote lock/unlock, vehicle locate, vehicle status and destination send-to-car, but the convenience most buyers want is simply absent: Audi did not fit factory remote engine start to its gasoline models until MY2024, so a 2021 A6 cannot be pre-warmed from the phone, there is no phone-as-key, and the myAudi user profiles that carry climate and seat preferences between cars arrived with MY2022. Audi connect PRIME is a paid subscription after the included trial.

Two USB-C data ports up front and rear-seat USB-C charging cover the basics, and the Audi phone box adds wireless charging with signal boosting. But on the volume 2021 Premium wireless charging is not standard — it costs the $1,500 Convenience package or a step to Premium Plus — and there is no household outlet or high-wattage onboard power anywhere in the range.

2021 is the year Audi made the advanced key standard on the base Premium rather than a package item, so proximity entry and push-button start come with the volume trim, and the Prestige adds power soft-closing doors and a power trunk lid. It stays well out of the top band because the 2021 A6 offers no phone-as-key or digital-key sharing and, unlike a MY2024-or-later Audi, no factory remote start at any price.

A rearview camera with Audi parking system plus front and rear sensors is standard on every 2021 A6, and this is the model year Audi made the top-view surround camera reachable on the base Premium through the $1,500 Convenience package rather than requiring a whole trim step — better availability than the 2022 car, where surround view starts at Premium Plus. Only the fact that the $55,945 base car does not include it outright keeps this below the top band.

The A6's head-up display is good — a large projected window with junction-zoom navigation guidance — and it is Prestige-only for 2021. It scores above the 2022 car because 2021 still offered a four-cylinder 45 TFSI Prestige at $65,945, so a buyer could reach the HUD without also buying the V6; from 2022 Audi dropped that trim and the cheapest A6 with a HUD became the $70,545 55 TFSI Prestige. Availability, not quality, is what scores here, and two trims up is still a long reach.

The hardware is right — IIHS rates the 2021 A6's LATCH ease of use Good, with two outboard positions carrying complete hardware — and 38.1 in of rear headroom makes seat installation less of a contortion than the sloping roofline suggests. The binding constraint is the 13.7 cu ft trunk for a stroller plus a week's gear, and sedan door apertures with a low floor mean more lifting than any crossover asks for.

The crash credentials are excellent — 2021 IIHS TOP SAFETY PICK+ with Good in all six crashworthiness tests and Superior front crash prevention both vehicle-to-vehicle and pedestrian, plus five stars overall from NHTSA. It scores below the 2022 car on two specific 2021 gaps: rear side airbags and direct tire-pressure monitoring were not yet standard (that came for 2022), and the base Premium's headlights rate only Acceptable where the upper trims rate Good. Adaptive Cruise Assist with active lane assist did at least become standard on the Premium Plus for 2021.

Consumer Reports found the 2021 A6's seats comfortable and supportive even for long trips and most wind and road noise contained, and three-zone automatic climate with rear vents is standard, so four people travel well. The limits are gear rather than people: 13.7 cu ft of trunk with all seats occupied, no rear entertainment, and heated rear seats and four-zone climate needing the Premium Plus Executive package or a Prestige.

At cruise the A6 is an easy, low-fatigue car — light controls, a contained cabin, standard front and rear parking sensors — but this item measures exactly the traffic case where the 2021 car is weakest. Consumer Reports' 2021 test found it hesitates during rolling stops and low-speed acceleration and that the dual-clutch's shifts lack the smoothness expected of a $60,000 sedan, and Adaptive Cruise Assist with traffic jam assist is a Premium Plus item rather than standard.

26 MPG combined is genuinely good for an all-wheel-drive mid-size luxury sedan and Consumer Reports calls the A6's economy class-leading, but the mild-hybrid 2.0T wants premium fuel, so the EPA puts annual fuel spend at $2,900 and 11.4 barrels of petroleum. Cheap per mile relative to its rivals, expensive per mile in absolute terms, and Audi consumables and dealer labour rates compound it.

A 194 in executive sedan with a roughly 40 ft turning circle is a handful in tight urban geometry, and thick A-pillars intrude on the forward three-quarter view even though the low beltline helps elsewhere. Standard front and rear parking sensors with a rearview camera do the compensating, and 2021 is the year the top-view camera became reachable on the base Premium via the $1,500 Convenience package rather than a trim step — a small but real improvement in who can actually get the help.

The A6 sedan carries no US factory tow rating — Audi neither publishes a capacity nor offers a hitch for it in this market, even though European and Australian cars are rated to roughly 2,500 kg braked — and a 13.7 cu ft sealed trunk with no bed, no payload figure and no flat load floor rules out real work duty. It is a luxury sedan and does not pretend otherwise.

Nothing about the A6 is built for abuse: leather and wood rather than washable surfaces, about 4 in of ground clearance, and dual-clutch and optional air-suspension hardware that is expensive to fix on a car whose brand reliability record sits below the industry average. There is no fleet or commercial history behind this nameplate to draw on.

There is essentially no work-oriented provision: no onboard household power, no factory roof rails on the sedan, no US hitch, no bed access and only basic trunk tie-downs with a 12V socket. The A6 allroad — which for 2021 gained the Black optic package and carries roof rails, a power tailgate and adaptive air suspension — is the body style Audi points at gear, not this one.

This is the A6's best mission: seats Consumer Reports calls comfortable and supportive even for long trips, a well-contained cabin, and a 19.0-gallon tank at 26 MPG combined giving roughly 490 miles between stops and nearly 590 at the highway rating. It sits just below the later cars because Adaptive Cruise Assist — the fatigue-reducing tech that defines this item — became standard only from the Premium Plus for 2021, and the standard steel-spring ride stays firm over textured pavement.

Standard quattro all-wheel drive on every 2021 trim is a real advantage over rear-drive rivals on snow and gravel and makes the A6 a credible ski-trip car — the 40/20/40 seatback's centre pass-through is literally designed for it. But about 4 in of ground clearance, no factory roof rails on the sedan, no US tow rating and no camp power keep it firmly on pavement; Audi's own answer to this brief is the allroad.

The 40/20/40 split rear seatback with a centre ski pass-through is the right flexibility for a sedan and swallows skis or long items without giving up both rear seats, and the trunk is unusually usable for its size thanks to a low lift-over lip and a deep floor. But everything still goes through a trunk aperture into 13.7 cu ft, with no roof rails, no hitch and no underfloor bin to expand it.

Standard quattro and a stiff C8 structure give the 2021 A6 far higher cornering limits than its size suggests, and Consumer Reports' own 2021 road test calls the handling lively and sporty with sharp steering that brings the driver into the action. It is composed and confident rather than playful, which places it in the upper-middle of this band for the segment.

Accurate and well weighted — Audi's progressive rack is sharp enough to place a 194-inch sedan confidently and Consumer Reports credits it with bringing the driver into the action — but the C8's electric system sends little road texture back through the rim, and reviewers of this generation consistently describe it as precise rather than communicative. Precise enough to place the car, numb enough to stay out of the top band.

Strong and consistent: Consumer Reports' 2021 test calls the braking performance superb and a source of control and confidence, and instrumented testing of this generation records a stop from 60 mph in about 103 feet with linear pedal response — a genuinely good result for a 4,101 lb sedan on all-season tyres. Marked MEDIUM because the instrumented figure is a generation-level result rather than a 2021-specific test.

Once rolling the 248 hp 2.0T with 12-volt mild hybrid is smooth, the MHEV system covers stop-start restarts cleanly and 273 lb-ft arrives from 1,600 rpm for a 6.1-second run to 60 mph. The calibration falls apart at walking pace: Consumer Reports' 2021 test finds the car hesitates during rolling stops and low-speed acceleration and that the seven-speed dual-clutch's shifts lack the smoothness expected of a $60,000 sedan. It scores marginally below the 2022 car, which gained 13 hp on the volume engine.

Well isolated at cruise with no vibration through the controls — Consumer Reports finds most wind and road noise contained — but the volume 45 TFSI's four-cylinder is explicitly called out as noticeable and less polished than the V6 in a car of this price and size. Audible and inoffensive rather than pleasant, which is the middle of the band.

A wide circle even for a 115.1 in wheelbase — standard quattro and the C8's front-axle packaging cost it steering lock, and it is one of the A6's few genuinely poor everyday-usability numbers. Cars.com's 40 ft for the 2021 car and the generation-level 11.93 m agree closely; CarBuzz's 36.4 ft entry for 2021 is an aggregator outlier, contradicted by CarBuzz's own 39.7 ft figure for the mechanically identical 2022 car.

Heated eight-way power front seats with four-way lumbar adjustment, a plentiful steering-wheel adjustment range and a low, well-judged driving position suit a broad range of sizes, and Consumer Reports found the twin-screen layout logical with well-organised icons. Two things keep it below the top band: nearly all climate and convenience adjustment lives on the lower touchscreen rather than on physical controls, and the driver's seat can feel a bit low.

Grippy, unflappable and quick enough at 6.1 seconds to 60 mph, but the volume 248 hp 45 TFSI's character is competence rather than charisma — a muted engine note, little steering feedback and a dual-clutch that stumbles at low speed. Pleasant, not a car you take the long way home in; 2021 buyers wanting more were pointed at the new Sport 45 TFSI, which adds 13 hp and Black optic styling but no extra character, or at the 444 hp S6.

A real content year rather than a carry-over: for 2021 Audi made the sunroof standard across the A6 line, added 19-inch wheels, the advanced key and an integrated toll module to the four-cylinder Premium, made Adaptive Cruise Assist with Audi active lane assist standard on Premium Plus, and made the power rear window and manual side sunshades standard on Prestige. On top of that sit standard quattro AWD on every A6 — where the 2021 BMW 530i and Mercedes E 350 still listed rear-drive base cars — plus leather, heated front seats, tri-zone climate, wireless Apple CarPlay/Android Auto, automatic emergency braking and lane departure warning. Held a few points under the 2022 car and well inside the competitive band because the base Premium still ran the 8.8-inch MMI display and did without Virtual Cockpit Plus (both became standard only for 2022), rear side airbags were not yet standard line-wide, and the top-view camera with MMI Navigation High was a Convenience-package extra on Premium.

Fair value, and a better deal in practice than the 2022 car despite less engine. Standard quattro at $55,945 delivered is content a rear-drive 530i or E 350 charged to match, the 335-hp 3.0T V6 at a $4,900 upcharge is well priced for the output, and 2021's added standard sunroof, advanced key and toll module came without a price increase — Audi raised the 45 TFSI $500 only for 2022. Crucially, a 2021 buyer could still transact: Audi Financial ran a near-zero .00005 money factor with $2,500 lease cash on the A6 45 before the chip shortage closed the window, where a 2022 buyer paid sticker. Against that, the US 45 TFSI made only 248 hp in 2021 to the 2022 car's 261, the base screen was the smaller 8.8-inch unit, the ladder still climbs to $70,545 for a Prestige, and the all-new-for-2021 Genesis G80 handed over comparable equipment several thousand dollars lower. U.S. News rates the car mid-pack for its year rather than at the top.

The broadest A6 sedan lineup of the C8 run and wider than the 2022 car's: Premium, Sport Premium, Premium Plus, Sport Premium Plus and Prestige on the 248-hp 45 TFSI, plus Premium, Premium Plus and Prestige on the 335-hp 55 TFSI V6, spanning roughly $56k to $71k delivered — the Sport variants and the four-cylinder Prestige both disappeared for 2022, and the Black optic sport package was newly offered on every trim in 2021 rather than only the V6. The S6 sits above and the A6 allroad wagon alongside on the same platform. The gaps are that quattro is mandatory with no cheaper front-drive entry, and the US A6 was gas-only where BMW's 5 Series family offered the 530e plug-in hybrid.

A slow seller, but 2021 is the least bad year of the C8's decline. Audi moved 9,544 A6/S6 sedans in the US in 2021, down 9% from 10,535 in 2020 — a far gentler slide than the 30% the nameplate shed in 2022 — yet still 46% below the 17,754 of 2019, and it fell while Audi of America as a whole grew 5% to 196,038. The A6 was not close to being Audi's volume car: the A5 (17,408) and A4 (16,263) both outsold it among passenger cars and the Q5 alone did 60,301, with segment buyers migrating to the crossovers.

The four rings carry genuine aspirational pull in the US — design-led, tech-forward, with quattro as a real brand asset rather than a marketing word — and the A6 sits nearer the flagship end of the range than the A4. 2021 was a growth year for the brand in a supply-constrained market, up 5% to 196,038 units. Held below the top band because Audi still trails BMW and Mercedes on outright luxury cachet and on the resale support that follows it, which is exactly where this particular car struggles: iSeeCars measures A6 five-year depreciation at 55.6% against a 46.4% luxury-midsize class average.

A model year of two halves, and better for buyers than either 2022 or the headline figures suggest. Through the first half of 2021 Audi Financial supported the A6 hard — a .00005 base money factor (effectively 0.1% APR) on the 45 with a 51% residual, plus $2,500 in lease cash — genuinely meaningful support on a slow-selling car in a shrinking segment. From July 2021 the chip shortage flipped it: industry transaction prices ran above MSRP for the rest of the year and incentives fell to a record-low 3.9% of ATP by December. Averaged across the year that lands above the 2022 A6's near-total absence of deals but well short of the 2023 run-out, when Audi was discounting into an inventory-normal market.

Comfortably mid-cycle and improving. 2021 is the third model year of the C8 generation launched for 2019 — young enough that the dual-screen MMI cabin and 48-volt mild-hybrid architecture still read as current — and Audi used it to add content (standard sunroof line-wide, advanced key and toll module on Premium, Adaptive Cruise Assist standard on Premium Plus) rather than coast. A 2021 buyer sat three model years ahead of the C8 facelift and bought long before Audi went public with the plan to rename the nameplate and take the A6 electric, so redesign risk was ordinary mid-cycle risk with no announced end-of-line — materially better than the position a 2023 buyer was in.

Well reviewed, demonstrably safe and with a genuine award to its name, but still not the outright pick of its class. It took IIHS 2021 TOP SAFETY PICK+ with Good ratings in all six crashworthiness evaluations — one of eight Audis honored that year — and Kelley Blue Book named it #5 among Best Luxury Mid-Size Cars of 2021, while Edmunds called it one of the best models available in the midsize luxury sedan class and CarBuzz scored it 8.4/10. Kept out of the top band because U.S. News places it at 7.5/10 and only eighth among 2021 luxury midsize cars, explicitly flagging below-average predicted reliability and less cargo space than most rivals, and there was no 10Best or NACTOY nod — comparison tests in 2021 still favored the 5 Series and E-Class.