The Audi A8 (D3, 4E) 4.2i V8 40V, producing 335 horsepower, represents a significant iteration of Audi’s flagship luxury sedan. Produced from 2002 to 2005, this variant occupied the upper echelon of the D3/4E A8 range, positioned as a performance-oriented alternative to the more common 3.0L and diesel offerings. It was a key model in establishing Audi’s reputation for combining sophisticated technology with robust performance in the luxury segment, primarily targeting buyers in Europe and North America who desired a powerful and technologically advanced full-size sedan.
Technical Specifications
| Brand | Audi |
| Model | A8 |
| Generation | A8 (D3, 4E) |
| Type (Engine) | 4.2i V8 40V (335 Hp) quattro Tiptronic |
| Start of production | June, 2002 |
| End of production | 2005 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 17.5-17.6 l/100 km (13.4 – 13.4 US mpg, 16.1 – 16.1 UK mpg, 5.7 – 5.7 km/l) |
| Fuel consumption (extra urban) | 8.7-8.8 l/100 km (27 – 26.7 US mpg, 32.5 – 32.1 UK mpg, 11.5 – 11.4 km/l) |
| Fuel consumption (combined) | 11.9-12.0 l/100 km (19.8 – 19.6 US mpg, 23.7 – 23.5 UK mpg, 8.4 – 8.3 km/l) |
| CO2 emissions | 286 – 288 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.3 sec |
| Acceleration 0 – 62 mph | 6.3 sec |
| Acceleration 0 – 60 mph | 6 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 5.3 kg/Hp, 188.2 Hp/tonne |
| Weight-to-torque ratio | 4.1 kg/Nm, 241.6 Nm/tonne |
| Power | 335 Hp @ 6500 rpm |
| Power per litre | 80.3 Hp/l |
| Torque | 430 Nm @ 3500 rpm (317.15 lb.-ft. @ 3500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | BFM |
| 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 | 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 | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Coolant | 11.5 l (12.15 US qt | 10.12 UK qt) |
| Kerb Weight | 1780 kg (3924.23 lbs.) |
| Max. weight | 2380 kg (5247 lbs.) |
| Max load | 600 kg (1322.77 lbs.) |
| Trunk (boot) space – minimum | 500 l (17.66 cu. ft.) |
| Fuel tank capacity | 90 l (23.78 US gal | 19.8 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (8%) | 2300 kg (5070.63 lbs.) |
| Permitted trailer load with brakes (12%) | 2300 kg (5070.63 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 95 kg (209.44 lbs.) |
| Length | 5051 mm (198.86 in.) |
| Width | 1894 mm (74.57 in.) |
| Height | 1444 mm (56.85 in.) |
| Wheelbase | 2944 mm (115.91 in.) |
| Front track | 1629 mm (64.13 in.) |
| Rear (Back) track | 1615 mm (63.58 in.) |
| Drag coefficient (Cd) | 0.27 |
| Minimum turning circle (turning diameter) | 12.1 m (39.7 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 6 gears, 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 | 235/55 R17 |
| Wheel rims size | 8J x 17 |
Powertrain & Engine Architecture
At the heart of the A8 4.2i lies the BFM engine, a 4.2-liter naturally aspirated V8. This engine, part of Audi’s long-running V8 family, features a 90-degree V-angle for optimal balance. It utilizes a multi-port fuel injection system and a double overhead camshaft (DOHC) valvetrain with five valves per cylinder – three intake and two exhaust – maximizing volumetric efficiency. The engine’s 11:1 compression ratio contributes to its high output. The engine is longitudinally mounted in the front of the vehicle. Paired with this engine is a six-speed Tiptronic automatic transmission, offering both fully automatic operation and manual gear selection via steering wheel-mounted paddles or the gear selector. The Tiptronic transmission was known for its smooth shifts and adaptive learning capabilities, adjusting shift points based on driving style.
Driving Characteristics
The 4.2i V8 Automatic A8 delivered a distinctly different driving experience compared to its four-cylinder or diesel counterparts. The 335 horsepower and 317 lb-ft of torque provided effortless acceleration, with a 0-60 mph time of around 6 seconds. While not a sports car, the A8 4.2i offered a level of performance that was uncommon in the full-size luxury segment at the time. The Tiptronic transmission, while smooth, did introduce a slight loss of responsiveness compared to a manual gearbox. Gear ratios were tuned for a balance of acceleration and cruising efficiency. The quattro all-wheel-drive system provided excellent traction in all weather conditions, enhancing stability and confidence.
Equipment & Trim Levels
The A8 4.2i typically came well-equipped, reflecting its position as the range-topping model. Standard features included leather upholstery, wood trim, a premium sound system, automatic climate control, and power-adjustable front seats with memory function. Optional extras included a rear seat entertainment system, massaging seats, adaptive cruise control, and a sunroof. The interior design emphasized luxury and comfort, with high-quality materials and meticulous attention to detail. Trim levels were relatively streamlined, with most customization options available as individual selections rather than distinct packages.
Chassis & Braking
The D3 A8 featured an advanced chassis design with an independent multi-link suspension at all four corners. This suspension setup provided a comfortable ride while maintaining good handling characteristics. The 4.2i model typically featured slightly stiffer springs and dampers compared to lower-powered variants to better manage the increased weight and performance. 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 control during emergency braking situations.
Market Reception & Comparison
The A8 4.2i was generally well-received by automotive critics, who praised its powerful engine, luxurious interior, and advanced technology. However, its fuel consumption was often cited as a drawback. Compared to the 3.0L V6 and diesel models, the 4.2i offered significantly more performance but at the cost of increased running costs. The 4.2i appealed to buyers who prioritized performance and refinement over fuel economy. Reliability was generally good, although the complex electronics and advanced features could occasionally require costly repairs.
Legacy
The Audi A8 (D3, 4E) 4.2i V8 40V remains a desirable used car today, particularly among enthusiasts who appreciate its combination of luxury, performance, and technology. The BFM engine is known for its durability, although regular maintenance is essential. The Tiptronic transmission, while generally reliable, can be susceptible to wear and tear with high mileage. Parts availability is generally good, but specialized components can be expensive. The D3 A8 4.2i represents a high point in Audi’s engineering prowess and continues to offer a compelling driving experience for those seeking a sophisticated and powerful luxury sedan.
