The Audi A8 (D3) 6.0i W12 quattro Tiptronic, produced between 2004 and 2007, represented the pinnacle of luxury and performance within the second generation (D3, internally designated 4E) of Audi’s flagship sedan. Positioned as the range-topping model, it showcased Audi’s engineering prowess with its unique W12 engine and advanced quattro all-wheel-drive system. This variant aimed to compete directly with the Mercedes-Benz S-Class and BMW 7 Series, offering a blend of opulent comfort, exhilarating performance, and cutting-edge technology. The D3 A8 was a significant departure from its predecessor, introducing an all-aluminum space frame – an industry first for a mass-produced vehicle – resulting in a lighter and more rigid chassis.
Technical Specifications
| Brand | Audi |
| Model | A8 |
| Generation | A8 (D3, 4E) |
| Type (Engine) | 6.0i W12 (450 Hp) quattro Tiptronic |
| Start of production | 2004 year |
| End of production | 2007 year |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban | 21.4 l/100 km (11 US mpg, 13.2 UK mpg, 4.7 km/l) |
| Fuel consumption (economy) – extra urban | 10.8 l/100 km (21.8 US mpg, 26.2 UK mpg, 9.3 km/l) |
| Fuel consumption (economy) – combined | 14.7 l/100 km (16 US mpg, 19.2 UK mpg, 6.8 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.1 sec |
| Acceleration 0 – 62 mph | 5.1 sec |
| Acceleration 0 – 60 mph | 4.8 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 4.4 kg/Hp, 229.6 Hp/tonne |
| Weight-to-torque ratio | 3.4 kg/Nm, 295.9 Nm/tonne |
| Power | 450 Hp @ 6200 rpm |
| Power per litre | 75 Hp/l |
| Torque | 580 Nm @ 4000-4700 rpm (427.79 lb.-ft. @ 4000-4700 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | BHT, BSB, BTE |
| Engine displacement | 5998 cm3 (366.02 cu. in.) |
| Number of cylinders | 12 |
| Engine configuration | W-engine |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 90.2 mm (3.55 in.) |
| Compression ratio | 10.7:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 12.5 l (13.21 US qt, 11 UK qt) |
| Coolant | 18.9 l (19.97 US qt, 16.63 UK qt) |
| Kerb Weight | 1960 kg (4321.06 lbs.) |
| Max. weight | 2510 kg (5533.6 lbs.) |
| Max load | 550 kg (1212.54 lbs.) |
| Trunk (boot) space – minimum | 500 l (17.66 cu. ft.) |
| Fuel tank capacity | 90 l (23.78 US gal, 19.8 UK gal) |
| Length | 5062 mm (199.29 in.) |
| Width | 1894 mm (74.57 in.) |
| Height | 1444 mm (56.85 in.) |
| Wheelbase | 2944 mm (115.91 in.) |
| Front track | 1619 mm (63.74 in.) |
| Rear (Back) track | 1605 mm (63.19 in.) |
| Drag coefficient (Cd) | 0.28 |
| Minimum turning circle | 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 | 255/40 R19 |
| Wheel rims size | 8.5J x 19 |
Powertrain & Engine Architecture
The heart of the A8 6.0i W12 is the BHT (and later BSB/BTE) engine, a 6.0-liter naturally aspirated W12. This engine is essentially two narrow-angle VR6 engines joined at a common crankshaft, creating a compact and smooth-running twelve-cylinder configuration. It features multi-port fuel injection and a double overhead camshaft (DOHC) valvetrain. The W12 produced 450 horsepower at 6200 rpm and a substantial 580 Nm (427.79 lb-ft) of torque between 4000 and 4700 rpm. Paired with this engine was 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, but wasn’t as quick or sporty as some dual-clutch transmissions available in competing models.
Driving Characteristics
The A8 6.0i W12 delivered effortless performance. The combination of the powerful W12 engine and the quattro all-wheel-drive system resulted in a 0-60 mph time of around 4.8 seconds and a governed top speed of 155 mph. The Tiptronic transmission, while smooth, did introduce a slight delay in shifts compared to manual transmissions or more advanced automatics. The quattro system provided excellent traction in all weather conditions, enhancing stability and confidence. However, the car’s considerable weight (approximately 4321 lbs) was noticeable during spirited driving, diminishing some of the agility expected from a luxury sedan. The gear ratios were tuned for grand touring comfort rather than outright acceleration, prioritizing smooth cruising and relaxed highway driving.
Equipment & Trim Levels
As the flagship model, the A8 6.0i W12 came standard with a comprehensive list of luxury features. These included premium leather upholstery, wood trim, a sunroof, multi-contour seats with massage function, a Bose sound system, and automatic climate control. Optional extras included adaptive cruise control, a rear-seat entertainment system, and upgraded leather packages. The interior design emphasized elegance and sophistication, with a focus on high-quality materials and meticulous craftsmanship. The dashboard layout was relatively straightforward, with a central information display providing access to various vehicle settings and functions.
Chassis & Braking
The A8’s all-aluminum space frame provided a lightweight and rigid foundation for the chassis. The suspension system consisted of an independent multi-link setup at the front and an independent trapezoidal lever setup at the rear. This configuration delivered a comfortable ride while maintaining good handling characteristics. The car was equipped with 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. The steering was a hydraulic rack-and-pinion system, offering precise and responsive steering feel.
Market Reception & Comparison
The A8 6.0i W12 was generally well-received by automotive critics, who praised its powerful engine, luxurious interior, and advanced technology. However, its high price tag and relatively poor fuel economy (16 US mpg combined) were often cited as drawbacks. Compared to the standard A8 models (such as the 3.2 FSI V6 or the 4.2 FSI V8), the W12 offered significantly more performance and a more opulent driving experience, but at a substantial premium. Against its rivals, the Mercedes-Benz S600 and BMW 760i, the A8 W12 offered a unique blend of German engineering and understated luxury.
Legacy
The Audi A8 (D3) 6.0i W12 quattro Tiptronic remains a desirable vehicle among enthusiasts and collectors. While the W12 engine is known for its reliability when properly maintained, it can be expensive to repair due to its complexity. The all-aluminum space frame, while innovative, is susceptible to corrosion in certain climates. Today, these cars can be found on the used car market, often commanding a premium price for well-maintained examples. The D3 A8, and particularly the W12 variant, represents a bold and ambitious chapter in Audi’s history, showcasing the brand’s commitment to innovation and luxury.
