The Audi S4 Cabriolet (8E/B6) 4.2i V8, produced from 2003 to 2004, represented the high-performance open-top variant of Audi’s popular S4 model line. Built on the B6 platform – shared with the Audi A4 Cabriolet – the S4 Cabriolet aimed to deliver exhilarating performance combined with the luxury and refinement expected of the Audi brand. This particular configuration, featuring the 4.2-liter V8 engine paired with the six-speed Tiptronic automatic transmission and Audi’s quattro all-wheel-drive system, occupied the top echelon of the S4 Cabriolet range, offering a blend of power, comfort, and all-weather capability. It was positioned as a direct competitor to other high-end performance convertibles like the BMW 3 Series Convertible and Mercedes-Benz CLK Cabriolet.
Technical Specifications
| Brand | Audi |
| Model | S4 |
| Generation | S4 Cabriolet (8E,B6) |
| Type (Engine) | 4.2i V8 40V (344 Hp) quattro Tiptronic |
| Start of production | 2003 |
| End of production | 2004 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 18.2 l/100 km (12.9 US mpg / 15.5 UK mpg / 5.5 km/l) |
| Fuel consumption (extra urban) | 9.4 l/100 km (25 US mpg / 30.1 UK mpg / 10.6 km/l) |
| Fuel consumption (combined) | 12.6 l/100 km (18.7 US mpg / 22.4 UK mpg / 7.9 km/l) |
| CO2 emissions | 302 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.2 sec |
| Acceleration 0 – 62 mph | 6.2 sec |
| Acceleration 0 – 60 mph | 5.9 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 5.5 kg/Hp, 181.5 Hp/tonne |
| Weight-to-torque ratio | 4.6 kg/Nm, 216.4 Nm/tonne |
| Power | 344 Hp @ 7000 rpm |
| Power per litre | 82.6 Hp/l |
| Torque | 410 Nm @ 3500 rpm (302.4 lb.-ft. @ 3500 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | BBK |
| Engine displacement | 4163 cm3 (254.04 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 84.5 mm (3.33 in.) |
| Piston Stroke | 92.8 mm (3.65 in.) |
| Compression ratio | 11:1 |
| Number of valves per cylinder | 5 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 9 l (9.51 US qt | 7.92 UK qt) |
| Coolant | 12 l (12.68 US qt | 10.56 UK qt) |
| Kerb Weight | 1895 kg (4177.76 lbs.) |
| Max. weight | 2355 kg (5191.89 lbs.) |
| Max load | 460 kg (1014.13 lbs.) |
| Trunk (boot) space – minimum | 246 l (8.69 cu. ft.) |
| Trunk (boot) space – maximum | 315 l (11.12 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal | 13.86 UK gal) |
| Length | 4573 mm (180.04 in.) |
| Width | 1778 mm (70 in.) |
| Height | 1391 mm (54.76 in.) |
| Wheelbase | 2654 mm (104.49 in.) |
| Front track | 1523 mm (59.96 in.) |
| Rear (Back) track | 1523 mm (59.96 in.) |
| Drag coefficient (Cd) | 0.31 |
| Minimum turning circle | 11.5 m (37.73 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears | 6 |
| Gearbox type | automatic transmission Tiptronic |
| 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 | Hydraulic Steering |
| Tires size | 235/40 R18 |
| Wheel rims size | 8J x 18 |
Powertrain & Engine Architecture
The heart of the S4 Cabriolet 4.2i was Audi’s BBK engine, a naturally aspirated 4.2-liter V8. This engine, a descendant of the V8 used in the Audi RS4, featured a 90-degree V-angle, four valves per cylinder, and a dual overhead camshaft (DOHC) design. The engine utilized a multi-port fuel injection system, delivering fuel directly into the intake ports. The BBK engine was known for its smooth power delivery and distinctive V8 soundtrack. Paired with this engine was a six-speed Tiptronic automatic transmission. This transmission allowed for both fully automatic operation and manual gear selection via steering wheel-mounted paddles or the gear selector. The Tiptronic transmission was designed to provide quicker shift times and a more engaging driving experience than a traditional automatic. Audi’s quattro all-wheel-drive system distributed power between all four wheels, enhancing traction and stability, particularly in adverse weather conditions.
Driving Characteristics
The combination of the 344 horsepower V8 and the Tiptronic transmission resulted in a brisk driving experience. Acceleration from 0 to 60 mph was achieved in around 5.9 seconds, and the car had a governed top speed of 155 mph. While not as overtly aggressive as the six-speed manual S4 Cabriolet, the Tiptronic version offered a more relaxed and refined driving experience, making it well-suited for long-distance cruising. The Tiptronic transmission’s gear ratios were tuned to provide a balance between acceleration and fuel efficiency. The quattro all-wheel-drive system provided excellent grip and stability, inspiring confidence in various driving conditions. However, some critics noted that the Tiptronic transmission could occasionally feel hesitant during quick downshifts.
Equipment & Trim Levels
The S4 Cabriolet 4.2i typically came well-equipped as standard. Interior features included leather upholstery, sport seats, automatic climate control, and a premium audio system. Exterior features included a unique S4 body kit, alloy wheels, and xenon headlights. Optional extras included navigation system, heated seats, and a wind deflector to reduce turbulence in the cabin when the top was down. The interior trim was generally finished in aluminum or wood accents, adding to the car’s luxurious feel.
Chassis & Braking
The S4 Cabriolet featured a sport-tuned suspension designed to provide a balance between comfort and handling. The front suspension utilized an independent multi-link setup, while the rear suspension employed an independent trapezoidal link design. Braking duties were handled by ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) was standard, enhancing safety and control during emergency braking situations.
Market Reception & Comparison
The S4 Cabriolet 4.2i was generally well-received by automotive critics. It was praised for its powerful engine, refined ride, and luxurious interior. However, the Tiptronic transmission was sometimes criticized for being less engaging than the manual gearbox. Fuel economy was also a concern, with the V8 engine consuming a significant amount of fuel. Compared to the 1.8T and 3.0 V6 versions of the A4 Cabriolet, the S4 offered a substantial performance upgrade, but at a higher price point. The S4 also competed with other high-performance convertibles, such as the BMW 3 Series Convertible and Mercedes-Benz CLK Cabriolet, offering a unique blend of German engineering and all-wheel-drive capability.
Legacy
The Audi S4 Cabriolet (8E/B6) 4.2i V8 has become a sought-after vehicle among enthusiasts. The BBK V8 engine is known for its reliability, although regular maintenance is essential. The Tiptronic transmission, while generally durable, can require expensive repairs if neglected. Today, well-maintained examples of the S4 Cabriolet command a premium in the used car market, appealing to buyers who appreciate its combination of performance, luxury, and all-weather capability. The car represents a high point in Audi’s early 21st-century performance offerings, and remains a compelling choice for those seeking a stylish and capable open-top grand tourer.
