In the world of midsize luxury vehicles, few nameplates carry the quiet, architectural authority of the Audi A6. Representing the eighth generation (internally designated as the C8 platform), the 2020 Audi A6 and its long-roof sibling, the A6 Avant, marked a decisive turning point for the Ingolstadt automaker. Rather than chasing the flamboyant curves of its rivals, Audi doubled down on razor-sharp surfacing, aerospace-grade build tolerances, and a digital-first cabin that made contemporary competitors feel a generation behind.
Where the A6 Sits in Audi’s Sedan and Wagon Hierarchy
To appreciate what the 2020 A6 brings to the table, it helps to understand its exact coordinates within Audi’s broader passenger car portfolio. Audi’s traditional combustion lineup follows a disciplined numerical ladder where higher numbers denote larger dimensions, richer materials, and greater prestige.
At the entry point sits the compact A3 Sedan, built on a transverse front-wheel-drive architecture shared with the Volkswagen Golf. Stepping up brings you to the A4 (and the sleeker, liftback A5 Sportback), which transitions to Audi’s longitudinal MLB Evo platform, offering better weight distribution and more refined proportions.
Directly above the A4 sits the A6, which serves as Audi’s quintessential midsize executive workhorse. While its mechanical sibling, the A7 Sportback, trades rear headroom and trunk volume for a dramatic four-door coupe silhouette, the A6 prioritizes traditional executive dignity and cabin spaciousness. Above the A6 sits only the flagship A8 limousine, which stretches the wheelbase for chauffeur-driven luxury.
On the wagon side of the family, the hierarchy mirrors the sedans. Below the A6 Avant lies the smaller A4 Avant (and its lifted, body-clad sibling, the A4 Allroad). Because Audi does not build an A8 wagon, the A6 Avant stands at the very pinnacle of Audi’s practical luxury estate offerings—serving as the foundation for both the rugged, air-suspended A6 Allroad and the twin-turbo V8 super-wagon, the RS6 Avant.
Exterior Design: Precision Over Drama
The 2020 A6 wears a design language heavily influenced by the Audi Prologue concept, trading the soft, rounded edges of the previous C7 generation for taut, muscular creases. Up front, the signature Singleframe grille sits wider and lower than before, flanked by slim, aggressive headlights available with HD Matrix LED technology that dynamically masks oncoming traffic while keeping high beams illuminated.
In profile, the sedan’s crisp “quattro blisters”—subtle flared arches sculpted directly over the front and rear wheel wells—pay homage to Audi’s rally heritage while visually widening the car’s stance. Measuring 4,939 mm (194.4 inches) in length with a 2,924 mm (115.1-inch) wheelbase, the A6 carries classic rear-drive proportions despite its front-biased engine layout. At the rear, a horizontal chrome strip bridges the sculpted LED taillights, visually anchoring the decklid.
The A6 Avant takes every bit of that front-end aggression and extends the roofline rearward into one of the most cohesive estate silhouettes ever penned. Rather than looking like a boxy afterthought, the Avant’s sharply raked D-pillar gives it a dynamic, forward-leaning posture while unlocking massive utility. Behind the power tailgate, the Avant provides 565 liters (roughly 20 cubic feet) of cargo volume with the rear seats upright—expanding to 1,680 liters when the 40:20:40 split bench is folded flat—compared to the sedan’s deep, square 530-liter (13.7 cubic feet) trunk.
Interior Luxury and the Triple-Screen Cockpit
Stepping inside the 2020 A6 feels less like entering a traditional wood-and-leather lounge and more like boarding a private jet. Audi eliminated nearly every physical button and rotary dial on the center console, replacing them with the MMI Touch Response dual-screen architecture.
Angled subtly toward the driver, the upper 10.1-inch touchscreen handles navigation, media, and vehicle settings, while a lower 8.6-inch display manages climate control, seat heating/ventilation, and handwriting text input. To overcome the common frustration of flat touchscreens requiring eyes-off-the-road precision, Audi engineered haptic and acoustic feedback into the glass: pressing a virtual icon requires deliberate pressure and rewards your finger with a crisp mechanical click and vibration. Directly ahead of the driver sits the 12.3-inch Audi Virtual Cockpit, capable of rendering full-screen Google Earth satellite maps directly behind the steering wheel.
Beyond the screens, craftsmanship is benchmark-setting. Open-pore ash wood inlays, brushed aluminum trim, and available Valcona leather upholstery wrap a cabin that remains whisper-quiet at triple-digit highway speeds, especially when optioned with dual-pane acoustic glass. Rear passengers enjoy generous legroom and four-zone automatic climate control, while audiophiles can specify a Bang & Olufsen 3D Advanced Sound System boasting 19 speakers and 1,820 watts of output (alongside a 16-speaker, 705-watt Bang & Olufsen setup on mid-tier trims).
Drivetrain Engineering and Engine Lineup
Underneath its aluminum-and-steel hybrid bodyshell, the 2020 A6 utilizes sophisticated mild-hybrid electrical systems across its global engine range to smooth out start-stop transitions and allow the engine to coast silently at cruising speeds.
40 TDI (2.0-liter Turbo Diesel): A staple in European and right-hand-drive import markets, this four-cylinder diesel produces 204 hp (150 kW) and 400 Nm of torque. Paired with a 12-volt mild-hybrid system and a 7-speed S tronic dual-clutch gearbox, it delivers effortless midrange passing power and routinely achieves 18 to 20 km/L (over 45 mpg US) on open highways.
45 TFSI (2.0-liter Turbo Petrol): Serving as the core gasoline offering in North America and global markets, this turbocharged four-cylinder generates 245 to 248 hp and 370 Nm (273 lb-ft) of torque. Assisted by a 12-volt mild-hybrid starter-generator, it propels the A6 from 0 to 100 km/h (62 mph) in roughly 6.1 seconds.
50 TDI (3.0-liter V6 Turbo Diesel): Available primarily in European and Avant configurations, this silky six-cylinder diesel cranks out 286 hp (210 kW) and 620 Nm of torque, paired with a 48-volt mild-hybrid system and an 8-speed Tiptronic torque-converter automatic for effortless long-distance towing and autobahn cruising.
55 TFSI (3.0-liter V6 Turbo Petrol): The crown jewel of the standard A6 lineup, this turbocharged V6 delivers 340 hp (250 kW) and 500 Nm (369 lb-ft) of torque. Backed by a 48-volt mild-hybrid architecture and a 7-speed S tronic dual-clutch transmission, it launches the sedan from 0 to 100 km/h in a brisk 5.1 seconds (under 5.0 seconds to 60 mph in independent testing).
Power delivery relies on two distinct flavors of Audi’s legendary all-wheel drive. Four-cylinder models utilize quattro with ultra technology, which decouples the rear axle during steady cruising to save fuel before re-engaging within milliseconds when wheel slip or aggressive cornering is detected. Six-cylinder models feature permanent mechanical quattro AWD with a self-locking center differential. Buyers can also choose between four suspension setups: standard steel springs, a lowered sport suspension, adaptive dampers, or adaptive air suspension—which pairs brilliantly with optional dynamic all-wheel steering to shrink the turning circle in tight city streets while enhancing high-speed lane-change stability.
How It Stacks Up: Audi A6 vs. Mercedes-Benz E-Class & BMW 5 Series
The midsize German executive triad remains one of the fiercest battlegrounds in the automotive industry, yet each of the three contenders has carved out a distinct personality for the 2020 model year.
| Feature / Dimension | 2020 Audi A6 (C8) | 2020 Mercedes-Benz E-Class (W213) | 2020 BMW 5 Series (G30) |
| Core Philosophy | High-tech precision & digital minimalism | Old-world opulence & plush ride isolation | Balanced athleticism & driver engagement |
| Infotainment Interface | Dual haptic touchscreens + Virtual Cockpit | Dual 12.3″ widescreens + touchpad/wheel | iDrive 7.0 touchscreen + physical rotary knob |
| Base Petrol Engine | 2.0L Turbo I4 (245–248 hp) | 2.0L Turbo I4 (255 hp) | 2.0L Turbo I4 (248 hp) |
| Step-Up 6-Cyl Petrol | 3.0L Turbo V6 (340 hp / 500 Nm) | 3.0L Turbo Inline-6 (362 hp / 500 Nm) | 3.0L Turbo Inline-6 (335 hp / 450 Nm) |
| Sedan Trunk Capacity | 530 liters (13.7 cu. ft.) | 540 liters (13.1 cu. ft. US spec) | 530 liters (14.0 cu. ft. US spec) |
| Wagon Cargo (Seats Up) | 565 liters (A6 Avant) | 640 liters (E-Class Estate) | 570 liters (5 Series Touring) |
Against the Mercedes-Benz E-Class (Sedan & Estate)
Where the Audi A6 feels like a sleek modernist loft, the 2020 Mercedes-Benz E-Class leans unapologetically into classic luxury. With flowing wood veneers, turbine-style air vents, and 64-color wrap-around ambient lighting, the E-Class feels warmer and more opulent inside—though its steering-wheel touch pads and pre-facelift COMAND infotainment controller feel noticeably older than Audi’s crisp haptic glass. On the road, the Mercedes prioritizes plush, floaty comfort over cornering sharpness. In wagon guise, the E-Class Estate remains the undisputed cargo king of the segment, swallowing 640 liters behind the rear seats compared to the A6 Avant’s 565 liters, and even offering rear-facing third-row jump seats in certain markets. However, the A6 counters with tighter body control, superior all-weather traction via standard or widely available quattro, and a more athletic stance.
Against the BMW 5 Series (Sedan & Touring)
The 2020 BMW 5 Series splits the difference between Mercedes’ softness and Audi’s digital precision, positioning itself as the driver’s choice. Even in non-M-Sport trims, the 5 Series communicates more road texture through its chassis and benefits from BMW’s sublime ZF 8-speed automatic transmission and silky B58 3.0-liter inline-six engine, which sounds sweeter near redline than Audi’s slightly gruff V6. Inside, BMW’s iDrive 7.0 system retains a physical rotary controller alongside its touchscreen and hard climate buttons—making it easier to operate blindfolded than the A6’s dual-screen layout. Where the A6 pulls ahead is cabin theater, standard all-wheel-drive confidence in adverse weather, and interior material richness; the 2020 5 Series’ cabin feels slightly more utilitarian in base trim compared to the A6’s jewel-like switchgear and standard leather appointments.
The 2020 Audi A6 and A6 Avant succeed by refusing to imitate their rivals. If you prioritize maximum wagon cargo volume and cloud-like softness, the Mercedes-Benz E-Class holds the edge; if rear-wheel-drive balance and physical climate buttons top your list, the BMW 5 Series remains hard to beat. Yet for buyers who want a midsize luxury sedan or wagon that blends razor-sharp exterior tailoring, effortless all-weather quattro poise, and the most forward-looking digital cockpit of its era, the C8 Audi A6 stands in a class of its own.
Compiled By Sipitali Shitsukane
Automotive Enthusiast, Car Imports Consultant