The Audi S6 Avant (C8) 3.0 TDI V6, produced from November 2020 to May 2023, 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 sophisticated alternative to the gasoline-powered S6 models, particularly appealing to buyers prioritizing fuel efficiency and strong low-end torque without sacrificing driving enjoyment. The C8 generation S6 Avant, built on the MLB Evo platform, aimed to deliver a refined and technologically advanced experience in the executive station wagon segment.
Technical Specifications
| Brand | Audi |
| Model | S6 |
| Generation | S6 Avant (C8) |
| Type (Engine) | 3.0 TDI V6 (344 Hp) Mild Hybrid quattro tiptronic |
| Start of production | November, 2020 |
| End of production | May, 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 7.1-7.5 l/100 km (33.1 – 31.4 US mpg, 39.8 – 37.7 UK mpg, 14.1 – 13.3 km/l) |
| CO2 emissions (WLTP) | 187-196 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), Electronically limited |
| Emission standard | Euro 6d-ISC-FCM |
| Weight-to-power ratio | 5.9 kg/Hp, 170.3 Hp/tonne |
| Weight-to-torque ratio | 2.9 kg/Nm, 346.5 Nm/tonne |
| Gross battery capacity | 0.5 kWh |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Battery location | Under the trunk |
| Recuperation output | 8 kW |
| Power | 344 Hp @ 3850-4000 rpm |
| Power per litre | 115.9 Hp/l |
| Torque | 700 Nm @ 1750-3250 rpm (516.29 lb.-ft. @ 1750-3250 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | EA897evo3 / DMKD |
| 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 | 16.7 l (17.65 US qt | 14.69 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.) |
| Trunk (boot) space – maximum | 1660 l (58.62 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal | 13.86 UK gal) |
| AdBlue tank | 22 l (5.81 US gal | 4.84 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (8%) | 2100 kg (4629.71 lbs.) |
| Permitted trailer load with brakes (12%) | 2100 kg (4629.71 lbs.) |
| Permitted trailer load without 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 | 1481 mm (58.31 in.) |
| Wheelbase | 2928 mm (115.28 in.) |
| Front track | 1620 mm (63.78 in.) |
| Rear (Back) track | 1603 mm (63.11 in.) |
| Front overhang | 924 mm (36.38 in.) |
| Rear overhang | 1102 mm (43.39 in.) |
| Drag coefficient (Cd) | 0.31 |
| Minimum turning circle (turning diameter) | 12.1 m (39.7 ft.) |
| Approach angle | 13.9° |
| Departure angle | 12.8° |
| Drivetrain Architecture | ICE and electric motor drive all four wheels, mixed mode operation |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 8 gears, 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 |
| Assisting systems | ABS, 4-wheel steering |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 255/40 R20 |
| Wheel rims size | 8.5J x 20 |
Powertrain & Engine Architecture
At the heart of the S6 Avant (C8) 3.0 TDI lies the EA897evo3 engine, a 3.0-liter V6 diesel. This engine, designated DMKD, benefits from advanced technologies like a turbocharger and an electric powered compressor (EPC). The EPC is a key component of the mild-hybrid system, providing near-instant boost to eliminate turbo lag and improve throttle response. The engine utilizes a diesel commonrail fuel injection system, delivering precise fuel metering for optimal combustion. The valvetrain employs a Dual Overhead Camshaft (DOHC) configuration with four valves per cylinder. The 48V mild-hybrid system incorporates a belt starter generator (BSG) and a small lithium-ion battery, enabling features like start-stop functionality, coasting with engine off, and regenerative braking. The eight-speed tiptronic automatic transmission is specifically tuned to handle the engine’s substantial 700 Nm (516 lb-ft) of torque.
Driving Characteristics
The 3.0 TDI with the tiptronic transmission delivers a distinctly different driving experience compared to the higher-output gasoline variants or even the manual diesel options. While not as overtly sporty, the 3.0 TDI offers effortless cruising and strong acceleration. The tiptronic transmission provides smooth and quick shifts, although it may not offer the same level of driver engagement as a manual gearbox. The mild-hybrid system contributes to a refined driving experience, masking some of the diesel engine’s inherent characteristics. The quattro all-wheel drive system ensures excellent traction in all weather conditions, enhancing stability and confidence. The gear ratios are optimized for both fuel efficiency and responsive acceleration, providing ample power for overtaking maneuvers.
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, and a comprehensive suite of driver-assistance systems. Optional extras included adaptive air suspension, massaging front seats, a panoramic sunroof, and various styling packages. Interior trim options ranged from brushed aluminum to carbon fiber, allowing buyers to personalize the cabin to their preferences. The S6 Avant also offered a range of connectivity features, including Apple CarPlay and Android Auto integration.
Chassis & Braking
The S6 Avant (C8) features an independent multi-link suspension setup at both the front and rear axles, providing a comfortable yet controlled ride. The suspension is tuned to balance performance and comfort, offering a good compromise for everyday driving. The braking system consists of ventilated discs all around, with larger discs at the front for enhanced stopping power. The standard equipment included ABS (Anti-lock braking system) and Audi’s 4-wheel steering system, which improves agility and maneuverability, especially at lower speeds.
Market Reception & Comparison
The S6 Avant 3.0 TDI was generally well-received by automotive critics. It was praised for its refined driving experience, strong performance, and excellent fuel economy. Compared to the gasoline-powered S6 models, the TDI offered a more economical option without sacrificing too much in terms of performance. However, some critics noted that the tiptronic transmission lacked the engagement of a manual gearbox. Against competitors like the BMW 5 Series Touring and Mercedes-Benz E-Class Estate, the S6 Avant stood out with its sophisticated technology and luxurious interior.
Legacy
The EA897evo3 engine family, including the DMKD variant, has proven to be relatively reliable, although preventative maintenance is crucial. The mild-hybrid system has also demonstrated good long-term durability. In the used car market, the S6 Avant 3.0 TDI represents a compelling value proposition, offering a blend of performance, practicality, and luxury at a competitive price point. However, potential buyers should be aware of the potential costs associated with diesel particulate filter (DPF) maintenance and AdBlue refills. Overall, the S6 Avant (C8) 3.0 TDI remains a desirable and capable executive station wagon.
