Technical Specifications
| Brand | Audi |
| Model | A8 |
| Generation | A8 (D4, 4H) |
| Type (Engine) | 4.2 FSI V8 (372 Hp) quattro Tiptronic |
| Start of production | 2010 |
| End of production | 2012 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 13.3 l/100 km (17.7 US mpg, 21.2 UK mpg, 7.5 km/l) |
| Fuel consumption (extra urban) | 7.2 l/100 km (32.7 US mpg, 39.2 UK mpg, 13.9 km/l) |
| Fuel consumption (combined) | 9.5 l/100 km (24.8 US mpg, 29.7 UK mpg, 10.5 km/l) |
| CO2 emissions | 219 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.7 sec |
| Acceleration 0 – 62 mph | 5.7 sec |
| Acceleration 0 – 60 mph | 5.4 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 4.9 kg/Hp, 202.7 Hp/tonne |
| Weight-to-torque ratio | 4.1 kg/Nm, 242.5 Nm/tonne |
| Power | 372 Hp @ 6800 rpm |
| Power per litre | 89.4 Hp/l |
| Torque | 445 Nm @ 3500 rpm (328.22 lb.-ft. @ 3500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | CDRA |
| 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 | 12.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 7.7 l (8.14 US qt | 6.78 UK qt) |
| Coolant | 11.5 l (12.15 US qt | 10.12 UK qt) |
| Kerb Weight | 1835 kg (4045.48 lbs.) |
| Max. weight | 2525 kg (5566.67 lbs.) |
| Max load | 690 kg (1521.19 lbs.) |
| Trunk (boot) space – minimum | 510 l (18.01 cu. ft.) |
| Trunk (boot) space – maximum | 906 l (32 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 | 5137 mm (202.24 in.) |
| Width | 1949 mm (76.73 in.) |
| Width including mirrors | 2111 mm (83.11 in.) |
| Height | 1460 mm (57.48 in.) |
| Wheelbase | 2992 mm (117.8 in.) |
| Front track | 1644 mm (64.72 in.) |
| Rear (Back) track | 1635 mm (64.37 in.) |
| Front overhang | 1003 mm (39.49 in.) |
| Rear overhang | 1142 mm (44.96 in.) |
| Drag coefficient (Cd) | 0.26 |
| Minimum turning circle (turning diameter) | 12.3 m (40.35 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 8 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 | Electric Steering |
| Tires size | 235/60 R17 |
| Wheel rims size | 8.0J x 17 |
The Audi A8 (D4) 4.2 FSI quattro Tiptronic, produced from 2010 to 2012, represents a high-performance iteration of the third-generation A8 flagship sedan. Positioned as a premium offering within the D4 range (internally designated 4H), this variant combined a naturally aspirated 4.2-liter V8 engine with Audi’s renowned quattro all-wheel-drive system and an eight-speed Tiptronic automatic transmission. It served as a step up from the base 3.0-liter models, offering significantly more power and a more luxurious driving experience, while remaining below the ultra-luxury of the extended-wheelbase and W12 options.
Powertrain & Engine Architecture
At the heart of the A8 4.2 FSI quattro Tiptronic lies the CDRA engine, a 4.2-liter naturally aspirated V8. This engine utilizes Audi’s FSI (Fuel Stratified Injection) direct injection technology, delivering fuel directly into the combustion chamber for improved efficiency and power. The engine boasts a 12.5:1 compression ratio and a dual overhead camshaft (DOHC) valvetrain with four valves per cylinder. The engine’s architecture is longitudinal, meaning it’s mounted with the crankshaft running front to back, a common configuration for rear-wheel-drive and all-wheel-drive vehicles. The eight-speed Tiptronic automatic transmission, a ZF-sourced unit, provides smooth and responsive gear changes. The Tiptronic system allows for both fully automatic operation and manual gear selection via steering wheel-mounted paddles or the gear selector.
Driving Characteristics
The 4.2 FSI engine delivers a robust 372 horsepower and 328 lb-ft of torque, resulting in a 0-60 mph time of around 5.4 seconds. The eight-speed Tiptronic transmission is well-tuned to the engine’s characteristics, providing quick and seamless shifts. While not as overtly sporty as some competitors, the A8 4.2 offers a refined and effortless driving experience. The quattro all-wheel-drive system provides excellent traction in all weather conditions, enhancing stability and confidence. Compared to the 3.0-liter variants, the 4.2 FSI offers significantly more power and a more authoritative feel. However, it lacks the low-end torque of the diesel options, such as the 3.0 TDI.
Equipment & Trim Levels
The A8 4.2 FSI quattro Tiptronic typically came well-equipped as standard. Features included leather upholstery, power-adjustable and heated front seats, a premium sound system, a navigation system, and a sunroof. Optional extras included extended leather trim, rear seat entertainment, adaptive cruise control, and a Bang & Olufsen sound system. The interior design emphasized luxury and sophistication, with high-quality materials and meticulous attention to detail. Dashboard configuration was characterized by Audi’s MMI (Multi Media Interface) system, controlling various vehicle functions through a central display screen.
Chassis & Braking
The A8 D4 featured an independent multi-link suspension at the front and an independent suspension on a trapezoidal lever at the rear, providing a comfortable and controlled ride. The chassis was constructed with a mix of aluminum and high-strength steel to reduce weight and enhance rigidity. Braking duties were handled by ventilated discs on all four wheels, coupled with Audi’s ABS (Anti-lock Braking System) and electronic stability control. The steering system utilized an electric power steering rack and pinion for precise and responsive handling.
Market Reception & Comparison
The A8 4.2 FSI quattro Tiptronic was generally well-received by automotive critics, who praised its powerful engine, refined ride, and luxurious interior. However, its fuel economy was often cited as a drawback compared to the more efficient 3.0-liter models. Compared to rivals like the BMW 750i and Mercedes-Benz S550, the A8 4.2 offered a compelling blend of performance, luxury, and technology. The 4.2 FSI variant appealed to buyers who prioritized power and driving enjoyment over ultimate fuel efficiency.
Legacy
The CDRA 4.2 FSI engine, while robust, is known to require diligent maintenance, particularly regarding carbon buildup on the intake valves. Regular oil changes and the use of high-quality fuel are crucial for long-term reliability. The Tiptronic transmission is generally reliable but can be expensive to repair if issues arise. Today, the A8 4.2 FSI represents a relatively affordable entry point into the luxury full-size sedan segment. Well-maintained examples continue to offer a comfortable and capable driving experience, but potential buyers should be prepared for the higher maintenance costs associated with a high-performance luxury vehicle.
