The Audi A8 (D4, 4H) 4.0 TFSI V8 quattro Tiptronic represents the pinnacle of performance and luxury within the fourth generation (D4) of Audi’s flagship sedan. Produced from May 2012 through 2013, this variant occupied the top echelon of the A8 lineup, offering a substantial increase in power and refinement compared to the 3.0 TFSI and 4.2 FSI models. It was positioned as a direct competitor to the BMW 750i and Mercedes-Benz S550, aiming to deliver a driving experience that blended dynamic handling with opulent comfort. The D4 generation A8, built on the Volkswagen Group’s D4 platform (shared with the Porsche Panamera), introduced significant advancements in lightweight construction, utilizing aluminum extensively in its body structure.
Technical Specifications
| Brand | Audi |
| Model | A8 |
| Generation | A8 (D4, 4H) |
| Type (Engine) | 4.0 TFSI V8 (420 Hp) quattro Tiptronic |
| Start of production | May, 2012 |
| End of production | 2013 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban | 13 l/100 km (18.1 US mpg, 21.7 UK mpg, 7.7 km/l) |
| Fuel consumption (economy) – extra urban | 7.3 l/100 km (32.2 US mpg, 38.7 UK mpg, 13.7 km/l) |
| Fuel consumption (economy) – combined | 9.4 l/100 km (25 US mpg, 30.1 UK mpg, 10.6 km/l) |
| CO2 emissions | 219 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.6 sec |
| Acceleration 0 – 62 mph | 4.6 sec |
| Acceleration 0 – 60 mph | 4.4 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 4.5 kg/Hp, 221.6 Hp/tonne |
| Weight-to-torque ratio | 3.2 kg/Nm, 316.6 Nm/tonne |
| Power | 420 Hp @ 5000 rpm |
| Power per litre | 105.2 Hp/l |
| Torque | 600 Nm @ 1500-4500 rpm (442.54 lb.-ft. @ 1500-4500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | CEUA |
| Engine displacement | 3993 cm3 (243.67 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 84.5 mm (3.33 in.) |
| Piston Stroke | 89 mm (3.5 in.) |
| Compression ratio | 10.1:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | BiTurbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 8.7 l (9.19 US qt | 7.65 UK qt) |
| Coolant | 15 l (15.85 US qt | 13.2 UK qt) |
| Kerb Weight | 1895 kg (4177.76 lbs.) |
| Max. weight | 2545 kg (5610.76 lbs.) |
| Max load | 650 kg (1433 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) | 0.27 |
| 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 |
INTRODUCTION
The Audi A8 (D4) 4.0 TFSI V8 quattro Tiptronic, launched in 2012, represented a significant upgrade within the D4 A8 range. It was designed to appeal to buyers seeking a blend of high performance, luxurious appointments, and all-weather capability. The “4H” designation refers to the updated version of the D4 platform, incorporating refinements to the chassis and electronics. This model year saw a focus on enhancing the already impressive technology suite and refining the driving experience. The 4.0 TFSI engine was a key differentiator, offering a substantial power increase over the base 3.0 TFSI engine and a more refined experience than the outgoing 4.2 FSI.
Powertrain & Engine Architecture
At the heart of the A8 4.0 TFSI lies the CEUA engine, a 3,993 cc (243.67 cu. in.) twin-turbocharged V8. This engine utilizes direct fuel injection (FSI) and a dual-scroll turbocharger configuration to deliver 420 horsepower at 5,000 rpm and a robust 600 Nm (442.54 lb.-ft.) of torque between 1,500 and 4,500 rpm. The engine’s architecture features a 90-degree V-angle, contributing to smooth operation and a compact overall size. The valvetrain employs double overhead camshafts (DOHC) with four valves per cylinder. Paired with the engine is Audi’s eight-speed Tiptronic automatic transmission, offering both fully automatic operation and manual gear selection via steering wheel-mounted paddles. The Tiptronic transmission is known for its smooth and quick shifts, contributing to the car’s overall refined driving experience. The quattro all-wheel-drive system distributes power between the front and rear axles as needed, providing excellent traction in all conditions.
Driving Characteristics
The A8 4.0 TFSI delivers a remarkably composed and effortless driving experience. The combination of the powerful V8 engine and the eight-speed Tiptronic transmission results in brisk acceleration – 0 to 60 mph in approximately 4.4 seconds. The Tiptronic transmission’s gear ratios are optimized for both performance and fuel efficiency. In automatic mode, the transmission seamlessly shifts through the gears, providing smooth and responsive acceleration. The quattro all-wheel-drive system provides exceptional grip, inspiring confidence in various driving conditions. Compared to the 3.0 TFSI, the 4.0 TFSI offers a significantly more potent and responsive driving experience. While the 3.0 TFSI prioritizes fuel economy, the 4.0 TFSI emphasizes performance without sacrificing a reasonable level of efficiency. The suspension, typically featuring adaptive air suspension, provides a comfortable ride while maintaining good body control.
Equipment & Trim Levels
The A8 4.0 TFSI came standard with a comprehensive array of luxury features. Interior appointments typically included Valcona leather upholstery, heated and ventilated front seats with massage functions, a premium sound system (often Bang & Olufsen), and a multi-function steering wheel. Standard technology features included Audi’s MMI infotainment system with navigation, Bluetooth connectivity, and a rearview camera. Optional extras included a head-up display, night vision assist, and advanced driver-assistance systems such as adaptive cruise control and lane-keeping assist. Trim levels were relatively streamlined, with the 4.0 TFSI representing the highest level of specification. Exterior features typically included 19-inch alloy wheels, LED headlights, and chrome accents.
Chassis & Braking
The A8 D4 chassis is constructed primarily of aluminum, contributing to a relatively lightweight body structure. The front suspension utilizes a multi-link design, while the rear suspension employs a trapezoidal link setup. Both front and rear brakes are ventilated discs, providing ample stopping power. The A8 4.0 TFSI typically features larger brake rotors compared to lower-trim models. The standard fitment of Audi’s adaptive air suspension allows the driver to adjust the ride height and damping characteristics, tailoring the driving experience to their preferences. Electronic Stability Control (ESC) and Anti-lock Braking System (ABS) are standard safety features.
Market Reception & Comparison
The Audi A8 4.0 TFSI was generally well-received by automotive critics, who praised its powerful engine, refined ride, and luxurious interior. It was often cited as a compelling alternative to the BMW 750i and Mercedes-Benz S550. Fuel economy, while respectable for a vehicle of this size and performance, was a common point of discussion, with combined fuel consumption averaging around 25 US mpg. Reliability reports have been generally positive, although the complexity of the twin-turbocharged engine and advanced technology systems can potentially lead to higher maintenance costs compared to simpler models. Compared to the A8 3.0 TFSI, the 4.0 TFSI offered a significant performance upgrade but at a higher price point. The 4.2 FSI, while offering similar power, was considered less refined and less fuel-efficient.
Legacy
The Audi A8 (D4) 4.0 TFSI V8 quattro Tiptronic remains a desirable vehicle in the used car market. Its combination of performance, luxury, and technology continues to appeal to discerning buyers. The CEUA engine, while complex, has proven to be relatively durable when properly maintained. Regular servicing, including oil changes and inspection of the turbochargers, is crucial for long-term reliability. The A8 D4’s innovative aluminum construction and advanced features have cemented its place as a significant milestone in Audi’s history, representing a high point in luxury sedan design and engineering.
