The Audi S6 (C7 facelift) equipped with the 4.0 TFSI V8 engine producing 450 horsepower and paired with the seven-speed S tronic dual-clutch transmission represents a high-performance iteration of Audi’s executive sedan. Produced from 2014 to 2018, this variant sat at the pinnacle of the C7 S6 lineup, offering a compelling blend of luxury, technology, and exhilarating performance. It was positioned as a direct competitor to the BMW M5 and Mercedes-AMG E63, targeting buyers seeking a sophisticated yet potent sports sedan. The C7 generation S6, and particularly this facelifted version, benefited from advancements in Audi’s quattro all-wheel-drive system and engine technology, solidifying its reputation as a capable grand tourer.
Technical Specifications
| Brand | Audi |
| Model | S6 |
| Generation | S6 (C7 facelift 2014) |
| Type (Engine) | 4.0 TFSI V8 (450 Hp) quattro S tronic |
| Start of production | 2014 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban | 13.1 l/100 km (18 US mpg, 21.6 UK mpg, 7.6 km/l) |
| Fuel consumption (economy) – extra urban | 6.9 l/100 km (34.1 US mpg, 40.9 UK mpg, 14.5 km/l) |
| Fuel consumption (economy) – combined | 9.2 l/100 km (25.6 US mpg, 30.7 UK mpg, 10.9 km/l) |
| CO2 emissions | 214 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.4 sec |
| Acceleration 0 – 62 mph | 4.4 sec |
| Acceleration 0 – 60 mph | 4.2 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 4.2 kg/Hp, 237.5 Hp/tonne |
| Weight-to-torque ratio | 3.4 kg/Nm, 290.2 Nm/tonne |
| Power | 450 Hp @ 5800-6400 rpm |
| Power per litre | 112.7 Hp/l |
| Torque | 550 Nm @ 1400-5700 rpm (405.66 lb.-ft. @ 1400-5700 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | CTGE |
| Engine displacement | 3993 cm3 (243.67 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 84.5 mm (3.33 in.) |
| Piston Stroke | 89 mm (3.5 in.) |
| Compression ratio | 10.1:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | BiTurbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 8.3 l (8.77 US qt | 7.3 UK qt) |
| Coolant | 15 l (15.85 US qt | 13.2 UK qt) |
| Kerb Weight | 1895 kg (4177.76 lbs.) |
| Max. weight | 2505 kg (5522.58 lbs.) |
| Max load | 610 kg (1344.82 lbs.) |
| Trunk (boot) space – minimum | 530 l (18.72 cu. ft.) |
| Fuel tank capacity | 75 l (19.81 US gal | 16.5 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 | 75 kg (165.35 lbs.) |
| Length | 4931 mm (194.13 in.) |
| Width | 1874 mm (73.78 in.) |
| Width including mirrors | 2086 mm (82.13 in.) |
| Height | 1430-1468 mm (56.3 – 57.8 in.) |
| Wheelbase | 2917 mm (114.84 in.) |
| Front track | 1615 mm (63.58 in.) |
| Rear (Back) track | 1607 mm (63.27 in.) |
| Front overhang | 924 mm (36.38 in.) |
| Rear overhang | 1090 mm (42.91 in.) |
| Drag coefficient (Cd) | 0.29 |
| Minimum turning circle (turning diameter) | 11.9 m (39.04 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 7 gears, automatic transmission S tronic |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent on trapezoidal lever |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 255/40 R19 |
| Wheel rims size | 8.5J x 19 |
Powertrain & Engine Architecture
The heart of the S6 is Audi’s 4.0 TFSI V8 engine, designated internally as the CTGE. This engine is a twin-turbocharged, direct-injection powerplant. The direct injection system, coupled with the twin-scroll turbochargers, delivers a broad torque curve and rapid response. The engine utilizes a DOHC (Dual Overhead Camshaft) valvetrain with four valves per cylinder, optimizing airflow for increased power output. The S tronic seven-speed dual-clutch transmission provides incredibly fast and smooth gear changes, contributing significantly to the car’s performance. This transmission allows for both fully automatic operation and manual gear selection via steering wheel-mounted paddles. The quattro all-wheel-drive system, a hallmark of Audi performance models, distributes power between the front and rear axles as needed, maximizing traction and stability in all conditions.
Driving Characteristics
The 450 hp and 405.66 lb-ft of torque, combined with the S tronic transmission and quattro all-wheel drive, result in a remarkably quick and composed driving experience. Acceleration from 0-60 mph takes approximately 4.2 seconds, and the car feels effortlessly powerful in everyday driving situations. The S tronic transmission’s quick shifts minimize power interruption, providing a seamless surge of acceleration. Compared to the standard S6 with its supercharged V6, the V8 offers a significantly more potent and refined power delivery. While the V6 provides adequate performance, the V8’s twin-turbo setup delivers a more substantial and immediate response. The gear ratios are tuned for both rapid acceleration and comfortable highway cruising. The quattro system provides exceptional grip, inspiring confidence in corners and adverse weather conditions.
Equipment & Trim Levels
The S6 (C7 facelift) 4.0 TFSI came standard with a comprehensive list of features, including leather upholstery, heated and ventilated front seats, a premium sound system, and a navigation system. The interior featured carbon fiber trim accents and S-specific badging. Optional extras included a panoramic sunroof, adaptive cruise control, and a driver assistance package with features like blind-spot monitoring and lane-keeping assist. Audi’s MMI infotainment system provided control over various vehicle functions and connectivity options. Exterior features included S-specific bumpers, side skirts, and a rear spoiler, along with 19-inch alloy wheels.
Chassis & Braking
The S6’s chassis is tuned for a balance of comfort and performance. It features an independent multi-link suspension at all four corners, providing excellent ride quality and handling. The suspension is slightly stiffer than the standard A6 to enhance body control. Braking duties are handled by ventilated discs at all four wheels, providing ample stopping power. The electronic stability control (ESC) system is integrated with the quattro all-wheel-drive system to enhance stability and prevent oversteer or understeer. The steering is precise and well-weighted, providing good feedback to the driver.
Market Reception & Comparison
The S6 (C7 facelift) 4.0 TFSI was generally well-received by automotive critics. It was praised for its powerful engine, refined ride quality, and advanced technology. Compared to its rivals, the BMW M5 and Mercedes-AMG E63, the S6 offered a more understated and sophisticated character. While the M5 and E63 prioritized outright performance, the S6 focused on providing a more balanced and comfortable driving experience. Fuel economy, while not a primary concern for buyers in this segment, was respectable for a high-performance sedan, averaging around 25.6 US mpg in combined driving. Reliability was generally good, although some owners reported minor issues with the infotainment system and occasional turbocharger-related concerns.
Legacy
The Audi S6 (C7 facelift) 4.0 TFSI remains a desirable used car today, offering a compelling combination of performance, luxury, and technology. The 4.0 TFSI V8 engine is known for its durability and potential for tuning. While maintenance costs can be higher than those of the standard A6, the V8’s robust construction and relatively straightforward design make it a reliable powerplant. The S tronic transmission, while offering exceptional performance, requires regular servicing to ensure optimal operation. The C7 S6, particularly this facelifted V8 variant, has cemented its place as a modern classic, appreciated by enthusiasts for its blend of performance and refinement.
