The Audi S6 (C8, facelift 2023) 3.0 TDI V6 (344 Hp) Mild Hybrid quattro tiptronic represents a refinement of the performance-oriented S6 model, introduced as part of the C8 generation’s mid-cycle refresh. Production spanned from June 2023 to March 2025, positioning it as a key offering in Audi’s executive sedan lineup. This variant combines a potent turbocharged diesel engine with a mild hybrid system and Audi’s renowned quattro all-wheel-drive, aimed at delivering both exhilarating performance and improved efficiency. It sits within the S6 range as a flagship powertrain option, offering a balance between the outright performance of gasoline-powered S models and the fuel economy benefits of diesel technology.
Technical Specifications
| Brand | Audi |
| Model | S6 |
| Generation | S6 (C8, facelift 2023) |
| Type (Engine) | 3.0 TDI V6 (344 Hp) Mild Hybrid quattro tiptronic |
| Start of production | June, 2023 |
| End of production | March, 2025 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Combined fuel consumption (WLTP) | 6.9-7.3 l/100 km (34.1 – 32.2 US mpg, 40.9 – 38.7 UK mpg, 14.5 – 13.7 km/l) |
| CO2 emissions (WLTP) | 182-191 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 6e |
| Weight-to-power ratio | 5.7 kg/Hp, 176 Hp/tonne |
| Weight-to-torque ratio | 2.8 kg/Nm, 358.1 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 |
| Electric motor | 1 |
| Electric motor location | Front, Longitudinal |
| Power | 344 Hp @ 3850-4000 rpm |
| 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 | 16.3:1 |
| 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 | 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 | 12 l (3.17 US gal | 2.64 UK gal) |
| Max. roof load | 90 kg (198.42 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 | 4964 mm (195.43 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 (Back) track | 1603 mm (63.11 in.) |
| Front overhang | 924 mm (36.38 in.) |
| Rear overhang | 1112 mm (43.78 in.) |
| Drag coefficient (Cd) | 0.28 |
| Minimum turning circle (turning diameter) | 12.1 m (39.7 ft.) |
| Approach angle | 13° |
| Departure angle | 16.4° |
| 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 |
| Tires size | 255/40 R20; 255/35 R21 |
| Wheel rims size | 8.5J x 20; 8.5J x 21 |
INTRODUCTION
The Audi S6 (C8) facelift, launched in 2023, builds upon the foundation of the C8 generation, which debuted in 2018. This refresh brought updated styling, enhanced technology, and refined powertrain options. The 3.0 TDI V6 (344 Hp) Mild Hybrid quattro tiptronic variant is a diesel-powered performance sedan designed for markets where diesel fuel is prevalent and emissions regulations allow. It represents a compelling alternative to gasoline-powered S6 models, offering a blend of performance, efficiency, and sophisticated technology. The C8 S6 competes directly with other high-performance executive sedans such as the BMW M550d and Mercedes-AMG E 53.
Powertrain & Engine Architecture
At the heart of this S6 variant lies the EA897evo3 3.0-liter V6 turbocharged diesel engine, designated with the code DMKD. This engine benefits from advanced technologies like a twin-scroll turbocharger and a sophisticated common-rail direct injection system operating at pressures up to 2,500 bar. The addition of an Electric Powered Compressor (EPC) helps to mitigate turbo lag, providing quicker throttle response. The mild hybrid system, utilizing a 48V electrical architecture, incorporates a belt-driven starter generator (BSG) that enables features like extended engine-off coasting, regenerative braking, and smoother start-stop operation. The eight-speed tiptronic automatic transmission is specifically tuned for the S6, offering quick and precise gear changes. It features a torque converter lockup clutch that engages early to improve efficiency and responsiveness. The transmission is integrated with Audi’s quattro all-wheel-drive system, utilizing a self-locking center differential to distribute torque between the front and rear axles as needed.
Driving Characteristics
The 3.0 TDI V6 with 344 horsepower and 700 Nm (516 lb-ft) of torque delivers strong acceleration, achieving 0-60 mph in approximately 4.8 seconds. While not as explosively quick as the gasoline-powered S6 variants, the diesel offers a broader, more usable powerband. The EPC effectively minimizes turbo lag, providing immediate response from a standstill and during overtaking maneuvers. The tiptronic transmission shifts smoothly and efficiently, and the driver can manually select gears using the steering wheel-mounted paddles. The quattro all-wheel-drive system provides exceptional traction and stability in all weather conditions. The suspension is tuned for a balance between comfort and handling, offering a composed ride quality without sacrificing agility.
Equipment & Trim Levels
The S6 (C8, facelift 2023) 3.0 TDI V6 Mild Hybrid quattro tiptronic typically comes well-equipped as standard. Features include Audi’s Virtual Cockpit digital instrument cluster, a touchscreen infotainment system with navigation, leather upholstery, heated and ventilated front seats, a premium sound system, and a comprehensive suite of driver-assistance systems such as adaptive cruise control, lane-keeping assist, and automatic emergency braking. Optional extras include carbon fiber trim, upgraded leather packages, a head-up display, and a panoramic sunroof. The interior design is characterized by its high-quality materials, meticulous craftsmanship, and user-friendly ergonomics.
Chassis & Braking
The S6 utilizes an independent multi-link suspension setup at both the front and rear axles, optimized for handling and ride comfort. The suspension geometry and damping characteristics are specifically tuned for the S6’s weight and performance characteristics. Braking duties are handled by ventilated disc brakes on all four wheels, with larger rotors and multi-piston calipers compared to the standard A6. The front brakes measure 400mm in diameter, while the rear brakes are 350mm. Audi’s ABS (Anti-lock Braking System) and Electronic Stability Control (ESC) systems are standard, providing enhanced safety and control.
Market Reception & Comparison
The 3.0 TDI V6 variant of the S6 was generally well-received by automotive critics, praised for its strong performance, refined driving experience, and impressive fuel economy. Compared to the gasoline-powered S6 models, the TDI offers superior fuel efficiency and a more relaxed cruising character. However, it may lack the outright excitement and responsiveness of its gasoline counterparts. Against competitors like the BMW M550d, the S6 offers a similar blend of performance and efficiency, with Audi’s reputation for interior quality and technology providing a competitive edge.
Legacy
The EA897 engine family, including the DMKD variant, has proven to be a reliable and durable powertrain. While diesel engines have faced increased scrutiny regarding emissions, Audi has implemented advanced technologies to minimize environmental impact. The S6 (C8) 3.0 TDI V6 Mild Hybrid quattro tiptronic represents a sophisticated and well-engineered performance sedan that offers a compelling alternative to traditional gasoline-powered models. On the used car market, these models are generally sought after for their blend of performance, efficiency, and luxury, and well-maintained examples are expected to hold their value reasonably well.
