The Audi S6 Avant (C8) 3.0 TDI V6, produced from April 2019 to November 2020, represents a compelling blend of performance and practicality within the Audi S6 lineup. Positioned as a premium offering, this variant combined a potent turbocharged diesel engine with a mild-hybrid system and Audi’s renowned quattro all-wheel drive. It served as a flagship estate car, appealing to buyers seeking high-speed touring capability and the versatility of a wagon body style. The C8 generation S6 Avant aimed to deliver a more refined and technologically advanced experience compared to its predecessor, the C7, while maintaining the S6’s reputation for understated performance.
Technical Specifications
| Brand | Audi |
| Model | S6 |
| Generation | S6 Avant (C8) |
| Type (Engine) | 3.0 TDI V6 (349 Hp) Mild Hybrid quattro tiptronic |
| Start of production | April, 2019 |
| End of production | November, 2020 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 7.8-8.1 l/100 km (30.2 – 29 US mpg) |
| CO2 emissions (WLTP) | 205-213 g/km |
| Fuel consumption (urban) | 7.7 l/100 km (30.5 US mpg) |
| Fuel consumption (extra urban) | 5.8 l/100 km (40.6 US mpg) |
| Fuel consumption (combined) | 6.5 l/100 km (36.2 US mpg) |
| CO2 emissions (NEDC) | 171 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5.1 sec |
| Acceleration 0 – 62 mph | 5.1 sec |
| Acceleration 0 – 60 mph | 4.8 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6d-TEMP-EVAP-ISC |
| Weight-to-power ratio | 5.8 kg/Hp |
| Weight-to-torque ratio | 2.9 kg/Nm |
| Gross battery capacity | 0.5 kWh |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Recuperation output | 8 kW |
| Power | 349 Hp @ 3850 rpm |
| Torque | 700 Nm @ 2500-3100 rpm (516.29 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | EA897evo2 / DEWA |
| Engine displacement | 2967 cm3 (181.06 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 91.4 mm (3.6 in.) |
| Compression ratio | 15.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger and Electric Powered Compressor, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6.1 l (6.45 US qt | 5.37 UK qt) |
| Coolant capacity | 13.6 l (14.37 US qt | 11.97 UK qt) |
| Kerb Weight | 2020 kg (4453.34 lbs.) |
| Max. weight | 2655 kg (5853.27 lbs.) |
| Max load | 635 kg (1399.94 lbs.) |
| Trunk (boot) space – minimum | 550 l (19.42 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal | 13.86 UK gal) |
| AdBlue tank | 12 l (3.17 US gal | 2.64 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (8%) | 2100 kg (4629.71 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4954 mm (195.04 in.) |
| Width | 1886 mm (74.25 in.) |
| Height | 1481 mm (58.31 in.) |
| Wheelbase | 2928 mm (115.28 in.) |
| Front track | 1620 mm (63.78 in.) |
| Rear track | 1603 mm (63.11 in.) |
| Drag coefficient (Cd) | 0.30 |
| Minimum turning circle | 12.1 m (39.7 ft.) |
| Drivetrain | All wheel drive (4×4) |
| Number of gears | 8 |
| Gearbox type | Automatic transmission tiptronic |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs, 400 mm |
| Rear brakes | Ventilated discs, 350 mm |
Powertrain & Engine Architecture
At the heart of the S6 Avant (C8) 3.0 TDI lies the EA897evo2 engine, a 3.0-liter V6 diesel. This engine, designated with the code DEWA, benefits from significant advancements over previous iterations, including a sophisticated turbocharging system incorporating both a conventional turbocharger and an electric powered compressor (EPC). The EPC is crucial in mitigating turbo lag, providing near-instantaneous boost at lower engine speeds, enhancing responsiveness. Fuel is delivered via a high-pressure common rail diesel injection system, optimized for efficient combustion and reduced emissions. The engine produces 349 horsepower at 3850 rpm and a substantial 700 Nm (516 lb-ft) of torque between 2500 and 3100 rpm. The mild-hybrid system, utilizing a 48V lithium-ion battery and a belt alternator-starter (BAS), enables features like extended engine-off coasting and smoother start-stop operation, contributing to improved fuel economy. The engine is longitudinally mounted, directing power to all four wheels via Audi’s quattro all-wheel-drive system. The transmission is an 8-speed tiptronic automatic, known for its quick and smooth shifts.
Driving Characteristics
The 3.0 TDI with the 8-speed tiptronic delivers a remarkably refined driving experience. While not as overtly aggressive as the gasoline-powered S6 variants, the diesel offers prodigious torque, resulting in strong acceleration in everyday driving situations. The EPC effectively minimizes turbo lag, providing a responsive throttle feel. The 0-60 mph sprint is dispatched in around 4.8 seconds, and the electronically limited top speed of 155 mph is easily achievable. The tiptronic transmission is well-programmed, offering both automatic convenience and the ability for the driver to manually select gears. Gear ratios are optimized for both performance and fuel efficiency. Compared to a manual transmission equipped S6, the automatic prioritizes ease of use and smooth power delivery, but may slightly diminish driver engagement. The quattro all-wheel drive system provides exceptional traction in all weather conditions, enhancing stability and confidence.
Equipment & Trim Levels
The S6 Avant (C8) 3.0 TDI typically came well-equipped as standard. Key features included Audi’s virtual cockpit digital instrument cluster, a premium sound system, leather upholstery, tri-zone automatic climate control, and a comprehensive suite of driver-assistance systems such as adaptive cruise control, lane-keeping assist, and automatic emergency braking. Optional extras included upgraded leather packages, a panoramic sunroof, and advanced infotainment features. The interior design emphasized a blend of luxury and sportiness, with aluminum trim accents and supportive sport seats. The exterior featured subtle S-model styling cues, including unique bumpers, side skirts, and quad exhaust outlets.
Chassis & Braking
The S6 Avant (C8) features a sophisticated chassis designed to balance comfort and handling. It utilizes an independent multi-link suspension setup at both the front and rear axles. The suspension is tuned to provide a comfortable ride while minimizing body roll during cornering. Standard equipment included Audi’s drive select system, allowing the driver to adjust the suspension settings to suit their preferences. Braking duties are handled by ventilated disc brakes at all four corners, with larger discs at the front for increased stopping power. The electronic stability control (ESC) system is finely tuned to work in conjunction with the quattro all-wheel drive, providing enhanced stability and control.
Market Reception & Comparison
The Audi S6 Avant (C8) 3.0 TDI was generally well-received by automotive critics. It was praised for its powerful and refined engine, comfortable ride, and practical wagon body style. The mild-hybrid system was also noted for its contribution to improved fuel economy. Compared to the gasoline-powered S6 variants, the TDI offered superior fuel efficiency and a broader torque curve, making it a more practical choice for long-distance driving. However, some critics noted that the diesel engine lacked the aural excitement of the gasoline engines. Against competitors like the BMW 5 Series Touring and Mercedes-Benz E-Class Estate, the S6 Avant stood out for its sophisticated technology and understated elegance.
Legacy
The EA897evo2 engine, in its various iterations, has proven to be a robust and reliable powerplant. The 3.0 TDI variant in the S6 Avant (C8) is generally considered to be a durable engine, provided it receives regular maintenance. Common issues, if any, typically relate to the diesel particulate filter (DPF) and the AdBlue system, particularly on vehicles primarily used for short trips. In the used car market, the S6 Avant (C8) 3.0 TDI holds its value well, appealing to buyers seeking a high-performance, practical, and technologically advanced estate car. Its blend of performance, efficiency, and refinement ensures its continued desirability for years to come.
