The Audi A8 (D3/4E) facelift of 2007, specifically the 3.0 TDI V6 variant producing 233 horsepower, represented a significant refinement of Audi’s flagship luxury sedan. Introduced in 2008 and continuing through 2010, this model occupied a crucial middle ground within the A8 range, offering a compelling blend of performance, efficiency, and technology. It was positioned as a more accessible alternative to the higher-performance 4.2-liter V8 models, while providing superior fuel economy and torque compared to the entry-level 2.8-liter variants. This generation A8 aimed to compete directly with the BMW 7 Series and Mercedes-Benz S-Class, offering a sophisticated driving experience and a technologically advanced interior.
Technical Specifications
| Brand | Audi |
| Model | A8 |
| Generation | A8 (D3, 4E, facelift 2007) |
| Type (Engine) | 3.0 TDI V6 (233 Hp) quattro Tiptronic |
| Start of production | 2008 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 12 l/100 km (19.6 US mpg, 23.5 UK mpg, 8.3 km/l) |
| Fuel consumption (extra urban) | 6.4 l/100 km (36.8 US mpg, 44.1 UK mpg, 15.6 km/l) |
| Fuel consumption (combined) | 8.4 l/100 km (28 US mpg, 33.6 UK mpg, 11.9 km/l) |
| CO2 emissions | 224 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.8 sec |
| Acceleration 0 – 62 mph | 7.8 sec |
| Acceleration 0 – 60 mph | 7.4 sec |
| Maximum speed | 243 km/h (150.99 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 7.9 kg/Hp, 126.3 Hp/tonne |
| Weight-to-torque ratio | 4.1 kg/Nm, 243.9 Nm/tonne |
| Power | 233 Hp @ 4000 rpm |
| Power per litre | 78.5 Hp/l |
| Torque | 450 Nm @ 1400-3250 rpm (331.9 lb.-ft. @ 1400-3250 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | ASB |
| Engine displacement | 2967 cm3 (181.06 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 91.4 mm (3.6 in.) |
| Compression ratio | 17:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 8.2 l (8.66 US qt | 7.21 UK qt) |
| Coolant | 15.8 l (16.7 US qt | 13.9 UK qt) |
| Kerb Weight | 1845 kg (4067.53 lbs.) |
| Max. weight | 2445 kg (5390.3 lbs.) |
| Max load | 600 kg (1322.77 lbs.) |
| Trunk (boot) space – minimum | 500 l (17.66 cu. ft.) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (8%) | 2200 kg (4850.17 lbs.) |
| Permitted trailer load with brakes (12%) | 2200 kg (4850.17 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 95 kg (209.44 lbs.) |
| 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 | 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 |
INTRODUCTION
The Audi A8 (D3/4E) facelift, launched in 2007, represented a mid-cycle refresh of the second-generation A8. This iteration brought subtle styling changes, enhanced technology, and refined engine options. The 3.0 TDI V6 with 233 horsepower, coupled with Audi’s Tiptronic automatic transmission and quattro all-wheel drive, was a popular choice, particularly in European markets. It offered a balance between performance and fuel efficiency, appealing to buyers who desired a luxurious and capable sedan without the higher running costs of the larger displacement engines. This model year saw improvements to the Multi Media Interface (MMI) system and the addition of advanced safety features.
Powertrain & Engine Architecture
The heart of this A8 variant is the 3.0-liter V6 diesel engine, designated as the ASB engine code. This engine utilizes a common rail direct injection system, delivering fuel directly into the combustion chamber at extremely high pressure for optimized combustion. The engine features a single turbocharger with an intercooler, boosting power and torque. The valvetrain employs double overhead camshafts (DOHC) with four valves per cylinder, enhancing breathing and overall efficiency. The Tiptronic 6-speed automatic transmission provides smooth and responsive gear changes. It allows for both fully automatic operation and manual gear selection via steering wheel-mounted paddles or the gear selector. The quattro all-wheel drive system distributes power between the front and rear axles, providing enhanced traction and stability in various driving conditions. The engine’s longitudinal mounting and front placement contribute to the A8’s balanced handling characteristics.
Driving Characteristics
The 3.0 TDI V6 with the Tiptronic transmission delivers a refined and comfortable driving experience. While not as overtly sporty as the V8 models, it provides ample power for effortless cruising and confident overtaking. The 450 Nm (331.9 lb-ft) of torque, available from a low 1400 rpm, provides strong acceleration from a standstill and excellent in-gear responsiveness. The Tiptronic transmission is well-matched to the engine’s characteristics, offering smooth shifts and a willingness to downshift when needed. Compared to the manual transmission options available on other A8 variants, the Tiptronic prioritizes comfort and ease of use. The quattro all-wheel drive system inspires confidence in all weather conditions, providing excellent grip and stability. The gear ratios are tuned for a balance between fuel efficiency and performance, with a focus on maximizing torque in the mid-range.
Equipment & Trim Levels
The 3.0 TDI V6 A8 typically came well-equipped as standard. Features included leather upholstery, power-adjustable front seats with memory function, dual-zone automatic climate control, a premium audio system, and the advanced MMI infotainment system. Optional extras included a sunroof, upgraded leather packages, rear seat entertainment, adaptive cruise control, and parking assistance systems. Trim levels varied by market, but generally, this engine was offered in the base A8 trim and could be upgraded with various option packages. The interior typically featured wood or aluminum trim accents, and the dashboard layout was designed for a clean and sophisticated aesthetic.
Chassis & Braking
The A8 (D3/4E) utilizes an independent multi-link suspension system at both the front and rear, providing a comfortable and controlled ride. The suspension is tuned to prioritize ride quality, absorbing bumps and imperfections in the road surface effectively. The front suspension features ventilated disc brakes, while the rear brakes are also ventilated discs, providing ample stopping power. Anti-lock braking system (ABS) is standard, enhancing braking performance and stability. The steering system is a rack and pinion setup with hydraulic power assistance, offering precise and responsive steering feel. Stabilizer bars are fitted to both the front and rear axles to reduce body roll during cornering.
Market Reception & Comparison
The 3.0 TDI V6 A8 was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and luxurious interior. Fuel economy was a significant selling point, particularly in Europe where diesel engines are more popular. Compared to the 4.2-liter V8 models, the 3.0 TDI offered a more economical option without sacrificing too much performance. The 2.8-liter V6 models were less powerful and offered a less refined driving experience. Reliability was generally good, although, like any complex vehicle, it was susceptible to age-related issues.
Legacy
The Audi A8 (D3/4E) 3.0 TDI V6 with Tiptronic remains a desirable used luxury sedan. The ASB engine is known for its durability and relatively straightforward maintenance. However, potential buyers should be aware of the potential for issues with the turbocharger and common rail injection system as these components age. The Tiptronic transmission, while generally reliable, may require servicing or rebuilding at higher mileages. Overall, this variant represents a compelling value proposition for those seeking a comfortable, capable, and well-equipped luxury sedan at a reasonable price point. Its blend of performance, efficiency, and technology continues to appeal to enthusiasts and discerning buyers alike.
