The Audi S6 Avant (4A, C4) 4.2i V8 32V quattro Automatic, produced between September 1994 and October 1997, represents a high-performance iteration of Audi’s popular wagon, blending practicality with exhilarating performance. Positioned as the flagship variant of the C4 Avant range, it catered to buyers seeking a luxurious, spacious vehicle capable of delivering sports car-like acceleration. This model is part of the broader C4 S6 lineup, which also included sedan body styles and different engine options, but the Avant, with its unique combination of space and speed, held a special appeal. It was a key offering in Audi’s strategy to establish itself as a premium brand in the European and increasingly, North American, markets.
Technical Specifications
| Brand | Audi |
| Model | S6 |
| Generation | S6 Avant (4A,C4) |
| Type (Engine) | 4.2i V8 32V (290 Hp) quattro Automatic |
| Start of production | September, 1994 |
| End of production | October, 1997 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (combined) | 13.1 l/100 km (18 US mpg, 21.6 UK mpg, 7.6 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.3 sec |
| Acceleration 0 – 62 mph | 7.3 sec |
| Acceleration 0 – 60 mph | 6.9 sec |
| Maximum speed | 247 km/h (153.48 mph) |
| Weight-to-power ratio | 6 kg/Hp, 166.2 Hp/tonne |
| Weight-to-torque ratio | 4.4 kg/Nm, 229.2 Nm/tonne |
| Power | 290 Hp @ 5800 rpm |
| Power per litre | 69.5 Hp/l |
| Torque | 400 Nm @ 4000 rpm (295.02 lb.-ft. @ 4000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | AEC |
| Engine displacement | 4172 cm3 (254.59 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 84.5 mm (3.33 in.) |
| Piston Stroke | 93 mm (3.66 in.) |
| Compression ratio | 10.8:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Coolant | 8.5 l (8.98 US qt | 7.48 UK qt) |
| Kerb Weight | 1745 kg (3847.07 lbs.) |
| Max. weight | 2295 kg (5059.61 lbs.) |
| Max load | 550 kg (1212.54 lbs.) |
| Trunk (boot) space – minimum | 390 l (13.77 cu. ft.) |
| Trunk (boot) space – maximum | 1310 l (46.26 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%) | 1900 kg (4188.78 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.) |
| Height | 1440 mm (56.69 in.) |
| Wheelbase | 2692 mm (105.98 in.) |
| Front track | 1556 mm (61.26 in.) |
| Rear (Back) track | 1525 mm (60.04 in.) |
| Ride height (ground clearance) | 85 mm (3.35 in.) |
| Drag coefficient (Cd) | 0.35 |
| Minimum turning circle (turning diameter) | 11.4 m (37.4 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 4 gears, automatic 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), Hydraulic Steering |
| Tires size | 225/50 R16 |
| Wheel rims size | 7.5J x 16 |
Powertrain & Engine Architecture
The heart of the S6 Avant 4.2i is the AEC engine, a naturally aspirated 4.2-liter V8. This engine, a descendant of Audi’s long-standing V8 tradition, features a 90-degree V-angle for optimal balance. It utilizes a dual overhead camshaft (DOHC) design with four valves per cylinder (32V), contributing to its high power output. Fuel delivery is managed by a multi-port fuel injection system, providing precise fuel metering for efficient combustion. The engine produces 290 horsepower at 5800 rpm and 400 Nm (295 lb-ft) of torque at 4000 rpm. Paired with this engine is a four-speed automatic transmission, specifically designed to handle the V8’s power and deliver smooth shifts. This transmission features a torque converter and electronic control for optimized performance. The quattro all-wheel-drive system, a hallmark of Audi, distributes power between the front and rear axles, enhancing traction and stability, particularly in adverse weather conditions.
Driving Characteristics
The 4.2i V8 Automatic combination delivers a distinctly different driving experience compared to the manual transmission or the smaller-displacement engine options available in the C4 S6 range. While the automatic transmission doesn’t offer the direct control of a manual, it provides a relaxed and refined driving experience, well-suited for long-distance cruising. Acceleration from 0-60 mph takes approximately 6.9 seconds, a respectable figure for a wagon of this size and era. The quattro system provides excellent grip, allowing for confident cornering and stable handling. The automatic transmission’s gear ratios are tuned for a balance between acceleration and fuel efficiency, but the focus remains on delivering smooth, effortless power. Compared to the 2.2-liter inline-five turbo or the 1.8L four-cylinder options, the V8 offers significantly more torque across the rev range, resulting in stronger acceleration and a more authoritative feel.
Equipment & Trim Levels
The S6 Avant 4.2i Automatic came generously equipped as standard. Interior features typically included leather upholstery, power-adjustable front seats with memory function, a premium sound system, and automatic climate control. Exterior features included alloy wheels, a sport suspension, and subtle S6 badging. Optional extras included a sunroof, upgraded sound systems, and various interior trim options. The interior dashboard configuration was typical of the C4 Audi range, characterized by a clean, functional design with a focus on ergonomics. The S6 trim level also featured unique instrument cluster graphics and sport seats with enhanced bolstering.
Chassis & Braking
The S6 Avant featured a fully independent suspension system, with McPherson struts at the front and a trapezoidal link rear suspension. This setup provided a comfortable ride while maintaining good handling characteristics. The suspension was tuned to be slightly firmer than the standard A6 Avant, offering improved body control and reduced roll. Braking duties were handled by ventilated disc brakes on all four wheels, providing ample stopping power. An Anti-lock Braking System (ABS) was standard, enhancing safety and stability during hard braking. The steering was hydraulic power-assisted, offering precise and responsive control.
Market Reception & Comparison
The S6 Avant 4.2i Automatic was generally well-received by automotive critics. It was praised for its powerful engine, comfortable ride, and spacious interior. However, the automatic transmission was sometimes criticized for not being as engaging as the manual option. Fuel economy was also a concern, with the V8 engine consuming a significant amount of fuel. Compared to other trims in the S6 lineup, the 4.2i Automatic was positioned as the premium offering, appealing to buyers who prioritized comfort and effortless performance over outright sportiness. The 2.2-liter turbo offered a more affordable entry point, while the manual transmission provided a more driver-focused experience.
Legacy
The Audi S6 Avant (4A, C4) 4.2i V8 32V quattro Automatic has become a sought-after classic among Audi enthusiasts. The AEC V8 engine, while not known for being the most fuel-efficient, is generally considered to be reliable when properly maintained. The quattro all-wheel-drive system remains a key selling point, providing excellent traction and stability. Today, well-maintained examples command a premium in the used car market. Common maintenance issues include aging rubber components, potential oil leaks, and the need for regular servicing of the automatic transmission. Despite these potential issues, the S6 Avant 4.2i remains a compelling choice for those seeking a unique and capable performance wagon.
