The Audi S6 (C8) 3.0 TDI V6, produced from April 2019 to November 2020, represents a compelling blend of performance and efficiency within the executive sedan segment. Positioned as a diesel-powered variant of the fourth-generation S6 (C8), it offered a sophisticated alternative to its gasoline-fueled siblings, particularly in European markets where diesel engines remained popular. This model combined a potent 3.0-liter turbocharged diesel V6 with a 48-volt mild-hybrid system and Audi’s renowned quattro all-wheel drive, packaged within a luxurious and technologically advanced sedan body style. It served as a performance-oriented option, slotting below the more aggressively tuned RS6 but above the standard A6 models.
Technical Specifications
| Brand | Audi |
| Model | S6 |
| Generation | S6 (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 | Sedan |
| Seats | 5 |
| Doors | 4 |
| Combined fuel consumption (WLTP) | 7.7-8 l/100 km (30.5 – 29.4 US mpg) |
| CO2 emissions (WLTP) | 202-209 g/km |
| Fuel consumption (urban) | 7.4 l/100 km (31.8 US mpg) |
| Fuel consumption (extra urban) | 5.6 l/100 km (42 US mpg) |
| Fuel consumption (combined) | 6.2-6.3 l/100 km (37.9 – 37.3 US mpg) |
| CO2 emissions (NEDC) | 164-165 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5 sec |
| Acceleration 0 – 62 mph | 5 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 | 5.6 kg/Hp |
| Weight-to-torque ratio | 2.8 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 | 1955 kg (4310.04 lbs.) |
| Max. weight | 2590 kg (5709.97 lbs.) |
| Max load | 635 kg (1399.94 lbs.) |
| Trunk (boot) space (minimum) | 520 l (18.36 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal | 13.86 UK gal) |
| AdBlue tank capacity | 12 l (3.17 US gal | 2.64 UK gal) |
| Max. roof load | 90 kg (198.42 lbs.) |
| Permitted trailer load (brakes 8%) | 2100 kg (4629.71 lbs.) |
| Permitted trailer load (brakes 12%) | 2100 kg (4629.71 lbs.) |
| Permitted trailer load (no brakes) | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 95 kg (209.44 lbs.) |
| Length | 4954 mm (195.04 in.) |
| Width | 1886 mm (74.25 in.) |
| Width including mirrors | 2110 mm (83.07 in.) |
| Height | 1446 mm (56.93 in.) |
| Wheelbase | 2928 mm (115.28 in.) |
| Front track | 1620 mm (63.78 in.) |
| Rear track | 1603 mm (63.11 in.) |
| Front overhang | 924 mm (36.38 in.) |
| Rear overhang | 1102 mm (43.39 in.) |
| Drag coefficient (Cd) | 0.29 |
| Minimum turning circle | 12.1 m (39.7 ft.) |
| Drivetrain Architecture | ICE and electric motor drive all wheels |
| Drive wheel | 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 |
INTRODUCTION
The Audi S6 (C8) 3.0 TDI V6, launched in 2019, is a performance-oriented variant of the C8 generation S6. Built on the MLB Evo platform (shared with other Volkswagen Group vehicles like the Porsche Panamera), it aimed to deliver a refined yet powerful driving experience. The C8 S6 represented a shift towards greater technological integration, with a focus on mild-hybrid electrification to improve fuel economy and reduce emissions. This particular diesel variant was primarily targeted at European markets, where diesel engines were still favored for their fuel efficiency and torque characteristics. It offered a compelling alternative to the gasoline-powered S6 models, providing a different character and driving experience.
Powertrain & Engine Architecture
At the heart of the S6 3.0 TDI lies the EA897evo2 3.0-liter V6 diesel engine, designated with the code DEWA. This engine is a sophisticated design featuring a cast iron block, aluminum cylinder heads, and four valves per cylinder. It utilizes a common rail direct injection system operating at extremely high pressures (2500 bar) for optimized fuel atomization and combustion. A single twin-scroll turbocharger, coupled with an electric powered compressor (EPC), provides forced induction, minimizing turbo lag and delivering strong performance across the rev range. The EPC is powered by the 48V mild-hybrid system, providing boost on demand. The mild-hybrid system incorporates a belt starter generator (BSG) and a small lithium-ion battery, enabling features like extended start-stop operation, coasting with engine off, and regenerative braking. The engine produces 349 horsepower at 3850 rpm and a substantial 700 Nm (516 lb-ft) of torque between 2500 and 3100 rpm. This power is channeled through an eight-speed tiptronic automatic transmission, which offers smooth and quick shifts.
Driving Characteristics
The S6 3.0 TDI with the eight-speed automatic delivers a remarkably smooth and effortless driving experience. The abundance of torque from the diesel engine provides strong acceleration in virtually any gear, making overtaking and highway cruising a breeze. While not as explosively quick as the gasoline-powered S6 variants, the TDI offers a more relaxed and refined power delivery. The tiptronic transmission is well-tuned, providing seamless gear changes and responsive kickdowns. The quattro all-wheel-drive system ensures excellent traction in all weather conditions, enhancing stability and confidence. The 48V mild-hybrid system contributes to improved fuel economy, particularly in urban driving, and adds a subtle boost during acceleration. The gear ratios are optimized for both performance and efficiency, with a relatively tall final drive to aid fuel economy and a close-ratio spread for responsive acceleration.
Equipment & Trim Levels
The S6 3.0 TDI typically came well-equipped as standard. Key features included Audi’s virtual cockpit digital instrument cluster, a large infotainment touchscreen with MMI navigation plus, leather upholstery, three-zone automatic climate control, and a premium sound system. Exterior features included S-specific styling cues such as a unique grille, bumpers, and exhaust outlets. Optional extras included features like adaptive air suspension, matrix LED headlights, a head-up display, and various driver-assistance systems such as adaptive cruise control and lane-keeping assist. Interior trim options included a range of wood, carbon fiber, and aluminum accents, allowing buyers to personalize the cabin to their preferences.
Chassis & Braking
The S6 3.0 TDI 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 maintaining precise control and minimizing body roll. Standard brakes consisted of ventilated discs all around, with larger front discs (400mm) and rear discs (350mm) compared to the standard A6. The electronic stability control (ESC) system is integrated with the quattro all-wheel-drive system to provide enhanced stability and traction. Available options included adaptive air suspension, which allowed drivers to adjust the ride height and damping characteristics to suit their preferences.
Market Reception & Comparison
The S6 3.0 TDI was generally well-received by automotive critics, who praised its blend of performance, efficiency, and refinement. It was often lauded for its strong torque delivery, comfortable ride, and luxurious interior. Compared to the gasoline-powered S6 variants, the TDI offered superior fuel economy and a more relaxed driving experience. However, some critics noted that it lacked the outright excitement and responsiveness of the gasoline engines. Against competitors like the BMW 540d and Mercedes-Benz E 400 d, the S6 TDI held its own, offering a compelling package of performance, luxury, and technology. Reliability reports suggest that the EA897evo2 engine is generally robust, but like any modern diesel, it requires regular maintenance and the use of high-quality fuel and oil.
Legacy
The Audi S6 (C8) 3.0 TDI V6 represents a significant step in the evolution of the performance sedan. Its combination of a powerful diesel engine, mild-hybrid technology, and quattro all-wheel drive delivered a unique and compelling driving experience. While diesel engines have faced increasing scrutiny in recent years, the S6 TDI remains a desirable option in the used car market, particularly for those seeking a refined, efficient, and capable grand tourer. The EA897evo2 engine has proven to be a durable and reliable unit when properly maintained, ensuring that these S6 models will continue to provide years of enjoyable driving.
