The Audi S6 (C7) 4.0 TFSI V8 quattro S tronic represents a high-performance iteration of the C7 generation Audi S6, produced between April 2012 and 2014. Positioned as the flagship performance sedan within the A6 family, it offered a compelling blend of luxury, technology, and exhilarating performance. This variant was a key component of Audi’s strategy to deliver sophisticated, all-weather performance vehicles to a discerning clientele, primarily in European and North American markets. It served as a direct competitor to the BMW 550i and Mercedes-Benz E550, offering a more technologically advanced and aggressively styled alternative.
Technical Specifications
| Brand | Audi |
| Model | S6 |
| Generation | S6 (C7) |
| Type (Engine) | 4.0 TFSI V8 (420 Hp) quattro S tronic |
| Start of production | April, 2012 |
| End of production | 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban | 13.4 l/100 km (17.6 US mpg, 21.1 UK mpg, 7.5 km/l) |
| Fuel consumption (economy) – extra urban | 7.5 l/100 km (31.4 US mpg, 37.7 UK mpg, 13.3 km/l) |
| Fuel consumption (economy) – combined | 9.6 l/100 km (24.5 US mpg, 29.4 UK mpg, 10.4 km/l) |
| CO2 emissions | 225 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.6 sec |
| Acceleration 0 – 62 mph | 4.6 sec |
| Acceleration 0 – 60 mph | 4.4 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 4.5 kg/Hp, 221.6 Hp/tonne |
| Weight-to-torque ratio | 3.4 kg/Nm, 290.2 Nm/tonne |
| Power | 420 Hp @ 5500-6400 rpm |
| Power per litre | 105.2 Hp/l |
| Torque | 550 Nm @ 1400-5200 rpm (405.66 lb.-ft. @ 1400-5200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | CEUC |
| 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 | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 8.3 l (8.77 US qt | 7.3 UK qt) |
| Coolant | 12 l (12.68 US qt | 10.56 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.) |
| Trunk (boot) space – maximum | 995 l (35.14 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 | 85 kg (187.39 lbs.) |
| Length | 4931 mm (194.13 in.) |
| Width | 1874 mm (73.78 in.) |
| Width including mirrors | 2086 mm (82.13 in.) |
| Height | 1440-1468 mm (56.69 – 57.8 in.) |
| Wheelbase | 2916 mm (114.8 in.) |
| Front track | 1615 mm (63.58 in.) |
| Rear (Back) track | 1606 mm (63.23 in.) |
| Front overhang | 919 mm (36.18 in.) |
| Rear overhang | 1096 mm (43.15 in.) |
| Drag coefficient (Cd) | 0.30 |
| 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 |
INTRODUCTION
The Audi S6 (C7) 4.0 TFSI V8 quattro S tronic, launched in 2012, represented a significant leap forward in performance for the A6 lineage. Built on the Audi’s MLB platform (specifically the 4HX0/A3 variant), it aimed to deliver a more engaging driving experience without sacrificing the comfort and refinement expected of a luxury sedan. This model year marked a shift towards smaller displacement, turbocharged engines, and advanced transmission technologies. The C7 S6 was a key player in Audi’s strategy to establish itself as a leader in the premium performance segment, offering a compelling alternative to its German rivals.
Powertrain & Engine Architecture
At the heart of the S6 4.0 TFSI lies the CEUC engine, a 3,993 cc (243.67 cu. in.) naturally aspirated V8 engine. This engine utilizes a direct injection fuel system, delivering fuel directly into the combustion chambers for improved efficiency and power. The engine features a dual overhead camshaft (DOHC) valvetrain with four valves per cylinder, optimizing airflow for enhanced performance. Crucially, the ‘TFSI’ designation indicates the use of twin-scroll turbochargers, providing both rapid response and a broad torque curve. The engine produces 420 horsepower at 5,500-6,400 rpm and 405.66 lb.-ft. of torque between 1,400 and 5,200 rpm. Paired with the engine is Audi’s seven-speed S tronic dual-clutch transmission. This transmission offers incredibly fast and smooth gear changes, contributing significantly to the car’s acceleration and overall driving experience. The S tronic transmission features a multi-plate wet clutch design, providing superior heat dissipation and durability compared to dry-clutch systems.
Driving Characteristics
The S6 4.0 TFSI delivers a remarkably refined yet potent driving experience. The 4.0-liter V8 provides ample power throughout the rev range, with the turbochargers minimizing any noticeable lag. The S tronic transmission contributes to seamless acceleration, allowing the car to sprint from 0 to 60 mph in approximately 4.4 seconds. The quattro all-wheel-drive system ensures excellent traction in all weather conditions, providing a secure and confident feel. Compared to the standard A6 models, the S6 boasts a more responsive steering feel and a firmer suspension setup, enhancing handling and cornering ability. While not as overtly sporty as some of its rivals, the S6 strikes a compelling balance between performance and comfort, making it a suitable daily driver as well as a capable performance machine. The gear ratios in the S tronic transmission are optimized for both acceleration and fuel efficiency, providing a comfortable cruising experience on the highway.
Equipment & Trim Levels
The S6 4.0 TFSI came generously equipped as standard. Interior features typically included premium leather upholstery, heated and ventilated front seats, a multi-function steering wheel, and a high-end audio system. The dashboard featured Audi’s MMI infotainment system with a central display screen, providing access to navigation, audio controls, and vehicle settings. Optional extras included a panoramic sunroof, adaptive cruise control, a head-up display, and advanced driver-assistance systems. Exterior features included distinctive S6 styling cues, such as a unique grille, side skirts, and rear diffuser. LED headlights and taillights were also standard, providing excellent visibility and a modern aesthetic.
Chassis & Braking
The S6 4.0 TFSI features a sophisticated chassis designed to deliver both comfort and handling. The front suspension utilizes an independent multi-link setup, while the rear suspension employs an independent trapezoidal lever design. This configuration provides excellent wheel control and minimizes body roll during cornering. The car is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. Audi’s ABS (Anti-lock braking system) and electronic stability control systems further enhance safety and control. Compared to the standard A6, the S6 features a slightly lowered ride height and stiffer springs and dampers, contributing to its more dynamic handling characteristics.
Market Reception & Comparison
The Audi S6 4.0 TFSI V8 was generally well-received by automotive critics. It was praised for its powerful engine, refined transmission, and comfortable interior. However, some critics noted that its styling was somewhat understated compared to its rivals. In terms of fuel economy, the S6 4.0 TFSI achieved approximately 24.5 US mpg in combined driving, which was respectable for a high-performance sedan of its size and capability. Compared to the 3.0-liter supercharged V6 version of the S6, the 4.0 TFSI offered significantly more power and a more engaging driving experience, but at the cost of slightly lower fuel economy. Reliability has generally been good, although preventative maintenance, particularly regarding the turbochargers and direct injection system, is crucial.
Legacy
The Audi S6 (C7) 4.0 TFSI V8 quattro S tronic remains a desirable vehicle in the used car market today. Its combination of performance, luxury, and technology continues to appeal to enthusiasts. The 4.0 TFSI engine, while complex, has proven to be relatively durable when properly maintained. However, potential buyers should be aware of the potential for carbon buildup on the intake valves, a common issue with direct injection engines. Regular oil changes and the use of high-quality fuel are essential for maintaining the long-term reliability of this powertrain. The C7 S6 represents a high point in Audi’s performance sedan development, offering a compelling blend of sophistication and driving excitement.
