The Audi S6 (4A, C4) 2.2i 20V Turbo quattro, produced between June 1994 and July 1997, represents a significant evolution in the high-performance executive sedan segment. Positioned as the performance variant of the C4-generation Audi 100 (rebranded as the A6 in 1994), the S6 aimed to deliver a blend of luxury, practicality, and exhilarating performance. This specific 2.2-liter turbocharged inline-five configuration, paired with a six-speed manual transmission and Audi’s renowned quattro all-wheel-drive system, was a flagship offering, representing the pinnacle of the C4 S6 lineup in many European markets. It served as a direct competitor to BMW’s M5 and Mercedes-Benz’s E500, offering a unique driving experience characterized by its potent engine and all-weather capability.
Technical Specifications
| Brand | Audi |
| Model | S6 |
| Generation | S6 (4A,C4) |
| Type (Engine) | 2.2i 20V Turbo (230 Hp) quattro Manual 6-speed |
| Start of production | June, 1994 |
| End of production | July, 1997 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 14.6 l/100 km (16.1 US mpg, 19.3 UK mpg, 6.8 km/l) |
| Fuel consumption (extra urban) | 7.9 l/100 km (29.8 US mpg, 35.8 UK mpg, 12.7 km/l) |
| Fuel consumption (combined) | 10.7 l/100 km (22 US mpg, 26.4 UK mpg, 9.3 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.7 sec |
| Acceleration 0 – 62 mph | 6.7 sec |
| Acceleration 0 – 60 mph | 6.4 sec |
| Maximum speed | 241 km/h (149.75 mph) |
| Weight-to-power ratio | 7.2 kg/Hp, 139.4 Hp/tonne |
| Weight-to-torque ratio | 4.7 kg/Nm, 212.1 Nm/tonne |
| Power | 230 Hp @ 5900 rpm |
| Power per litre | 103.3 Hp/l |
| Torque | 350 Nm @ 1950 rpm (258.15 lb.-ft. @ 1950 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | AAN |
| Engine displacement | 2226 cm3 (135.84 cu. in.) |
| Number of cylinders | 5 |
| Engine configuration | Inline |
| Cylinder Bore | 81 mm (3.19 in.) |
| Piston Stroke | 86.4 mm (3.4 in.) |
| Compression ratio | 9.3:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 4.5 l (4.76 US qt | 3.96 UK qt) |
| Coolant | 9 l (9.51 US qt | 7.92 UK qt) |
| Kerb Weight | 1650 kg (3637.63 lbs.) |
| Max. weight | 2200 kg (4850.17 lbs.) |
| Max load | 550 kg (1212.54 lbs.) |
| Trunk (boot) space – minimum | 510 l (18.01 cu. ft.) |
| Fuel tank capacity | 80 l (21.13 US gal | 17.6 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%) | 1700 kg (3747.86 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 75 kg (165.35 lbs.) |
| Length | 4797 mm (188.86 in.) |
| Width | 1804 mm (71.02 in.) |
| Width including mirrors | 1920 mm (75.59 in.) |
| Height | 1430 mm (56.3 in.) |
| Wheelbase | 2692 mm (105.98 in.) |
| Front track | 1556-1563 mm (61.26 – 61.54 in.) |
| Rear (Back) track | 1525-1528 mm (60.04 – 60.16 in.) |
| Front overhang | 1022 mm (40.24 in.) |
| Rear overhang | 1083 mm (42.64 in.) |
| Drag coefficient (Cd) | 0.34 |
| Minimum turning circle (turning diameter) | 11.4 m (37.4 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives permanently the four wheels of the vehicle. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 6 gears, manual transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| 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 | Hydraulic Steering |
| Tires size | 225/50 R16 |
| Wheel rims size | 7.5J x 16 |
Powertrain & Engine Architecture
The heart of the S6 2.2i 20V Turbo is the AAN engine, a 2.2-liter inline-five cylinder powerplant. This engine is a descendant of Audi’s rally-bred engines, known for their robustness and tuning potential. The AAN features a cast iron block and an aluminum cylinder head with four valves per cylinder (20V). A single turbocharger, coupled with an intercooler, forces air into the engine, boosting power output. Fuel delivery is managed by a Bosch Motronic multi-port fuel injection system. The engine’s unique firing order contributes to its distinctive sound and smooth power delivery. The six-speed manual transmission, sourced from Getrag, provides precise gear changes and allows the driver to fully exploit the engine’s power. This transmission was specifically chosen to handle the high torque output of the turbocharged five-cylinder.
Driving Characteristics
The S6 2.2i 20V Turbo offers a compelling driving experience. The turbocharged engine delivers strong acceleration, with peak torque available from a relatively low 1950 rpm. This makes for effortless overtaking and responsive performance in everyday driving situations. The six-speed manual transmission allows for precise control, and the quattro all-wheel-drive system provides exceptional traction, particularly in adverse weather conditions. Compared to the naturally aspirated 2.8-liter V6 found in other A6 models, the 2.2i Turbo offers significantly more power and a more engaging driving experience. While not as raw or focused as the later RS6 models, the S6 strikes a good balance between performance and comfort. The gear ratios are well-matched to the engine’s powerband, providing strong acceleration in all gears.
Equipment & Trim Levels
The S6 2.2i 20V Turbo typically came well-equipped, reflecting its position as a premium performance sedan. Standard features included leather upholstery, power-adjustable front seats, climate control, and a high-quality audio system. Exterior features included unique alloy wheels, a subtle rear spoiler, and body-colored side skirts. Optional extras included a sunroof, upgraded audio systems, and metallic paint finishes. The interior trim was generally understated but elegant, with a focus on quality materials and craftsmanship.
Chassis & Braking
The S6’s chassis was designed to handle the increased power output of the turbocharged engine. It features independent suspension all around, with McPherson struts at the front and a trapezoidal link rear suspension. The suspension was tuned to provide a balance between comfort and handling. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power. An Anti-lock Braking System (ABS) was standard, enhancing safety and control. Stabilizer bars were fitted front and rear to reduce body roll during cornering.
Market Reception & Comparison
The Audi S6 2.2i 20V Turbo was generally well-received by automotive critics. It was praised for its potent engine, all-weather capability, and refined interior. However, some critics noted that the turbocharged engine could be prone to turbo lag, and fuel economy was not particularly impressive. Compared to the BMW M5 of the same era, the S6 offered a more understated and refined driving experience, while the M5 was more focused on outright performance. The S6 also offered a significant advantage in terms of all-weather traction thanks to its quattro system. Reliability was generally good, although the turbocharger and associated components required regular maintenance.
Legacy
The Audi S6 2.2i 20V Turbo remains a sought-after classic among Audi enthusiasts. The AAN engine is known for its durability and potential for modification. Well-maintained examples are becoming increasingly rare and valuable. The car’s unique combination of performance, luxury, and all-wheel-drive capability has cemented its place in automotive history. Today, these cars are often found in the hands of collectors and enthusiasts who appreciate their distinctive character and driving experience. While maintenance can be more involved than with more modern vehicles, the S6 2.2i 20V Turbo continues to provide a rewarding and engaging driving experience for those willing to invest the time and effort.
