The Audi A8 L (D4, 4H) 3.0 TDI V6 quattro Tiptronic represents a significant iteration of Audi’s flagship luxury sedan, produced between 2012 and 2014. This variant occupied a crucial middle ground within the D4 A8 lineup, offering a compelling blend of performance, efficiency, and technology. Positioned above the entry-level 2.8 FSI models and below the high-performance 4.2 TDI and 5.2 FSI variants, the 3.0 TDI aimed to deliver a refined driving experience for buyers prioritizing diesel economy and substantial torque. It was primarily marketed in Europe and other regions where diesel engines were favored, offering a sophisticated alternative to gasoline-powered luxury cars.
Technical Specifications
| Brand | Audi |
| Model | A8 |
| Generation | A8L (D4, 4H) |
| Type (Engine) | 3.0 TDI V6 (240 Hp) quattro Tiptronic |
| Start of production | 2012 |
| End of production | 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban (EPA) | 9.8 l/100 km (24 US mpg, 28.8 UK mpg, 10.2 km/l) |
| Fuel consumption (economy) – extra urban (EPA) | 6.5 l/100 km (36.2 US mpg, 43.5 UK mpg, 15.4 km/l) |
| Fuel consumption (economy) – combined (EPA) | 8.4 l/100 km (28 US mpg, 33.6 UK mpg, 11.9 km/l) |
| Fuel Type | Diesel |
| Acceleration 0 – 60 mph | 6.4 sec |
| Maximum speed | 210 km/h (130.49 mph), Electronically limited |
| Emission standard | ULEV 2 |
| Weight-to-power ratio | 8.6 kg/Hp, 115.9 Hp/tonne |
| Weight-to-torque ratio | 3.8 kg/Nm, 265.7 Nm/tonne |
| Power | 240 Hp @ 3550 rpm |
| Power per litre | 80.9 Hp/l |
| Torque | 550 Nm @ 1750 rpm (405.66 lb.-ft. @ 1750 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | CPNA |
| 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 | 16.3:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6.4 l (6.76 US qt | 5.63 UK qt) |
| Coolant | 11.5 l (12.15 US qt | 10.12 UK qt) |
| Kerb Weight | 2070 kg (4563.57 lbs.) |
| Trunk (boot) space – minimum | 510 l (18.01 cu. ft.) |
| Fuel tank capacity | 90 l (23.78 US gal | 19.8 UK gal) |
| Length | 5267 mm (207.36 in.) |
| Width | 1949 mm (76.73 in.) |
| Width including mirrors | 2111 mm (83.11 in.) |
| Height | 1471 mm (57.91 in.) |
| Wheelbase | 3122 mm (122.91 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) | 12.7 m (41.67 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives permanently the four wheels of the vehicle. |
| 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, Transverse stabilizer, Air suspension |
| Rear suspension | Independent on trapezoidal lever, Air suspension, Transverse stabilizer |
| Front brakes | Ventilated discs, 356 mm |
| Rear brakes | Ventilated discs, 330 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 255/45 R19; 265/40 R20 |
| Wheel rims size | 9J x 19; 9J x 20 |
INTRODUCTION
The Audi A8 L (D4, 4H) 3.0 TDI V6 quattro Tiptronic, produced from 2012 to 2014, is a long-wheelbase variant of the fourth-generation A8. The ‘L’ designation signifies an extended wheelbase, providing increased rear passenger legroom, a key feature for markets like China where chauffeur-driven luxury is common. Built on the Volkswagen Group’s 1HX0/A3 platform, this model aimed to balance the A8’s reputation for technological innovation and luxurious comfort with the efficiency and torque characteristics of a modern diesel engine. The 3.0 TDI represented a sweet spot in the range, appealing to buyers who didn’t require the outright performance of the larger V8 engines but still desired a sophisticated and capable grand tourer.
Powertrain & Engine Architecture
At the heart of the A8 L 3.0 TDI lies the CPNA engine code, a 2,967 cc (181.06 cu. in.) V6 diesel engine. This engine utilizes a common rail direct injection system, delivering fuel at extremely high pressures 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, contributing to efficient gas exchange. The engine’s 16.3:1 compression ratio is typical for a diesel engine, maximizing thermal efficiency. Paired with this engine is Audi’s eight-speed Tiptronic automatic transmission. This transmission offers both fully automatic operation and manual gear selection via steering wheel-mounted paddles or the gear selector. The Tiptronic transmission is known for its smooth shifts and responsiveness, contributing to a refined driving experience.
Driving Characteristics
The 3.0 TDI powertrain delivers a relaxed and effortless driving experience. With 240 horsepower and a substantial 405.66 lb.-ft. of torque available from just 1750 rpm, the A8 L offers strong acceleration and impressive overtaking capability. The 0-60 mph sprint takes approximately 6.4 seconds, and the electronically limited top speed is 130.49 mph. Compared to the higher-output 4.2 TDI, the 3.0 TDI feels less urgent, but its ample torque makes it feel surprisingly nimble for a large luxury sedan. The eight-speed Tiptronic transmission is well-matched to the engine, providing smooth and timely gear changes. The gear ratios are optimized for both fuel efficiency and responsive acceleration. While a manual transmission wasn’t offered with this engine, the Tiptronic’s manual mode allows drivers to take more control when desired.
Equipment & Trim Levels
The A8 L 3.0 TDI quattro Tiptronic came generously equipped as standard. Typical features included leather upholstery, power-adjustable and heated front seats, a multi-function steering wheel, a premium sound system, and a navigation system with MMI (Multi Media Interface) control. Standard safety features included ABS, electronic stability control, and multiple airbags. Optional extras included features like adaptive cruise control, a panoramic sunroof, massaging seats, and advanced parking assistance systems. Interior trim options varied, with choices in wood veneers and aluminum accents. The long wheelbase provided ample rear passenger space, and rear passengers benefited from individual climate control and entertainment options.
Chassis & Braking
The A8 L 3.0 TDI features an independent suspension system on all four wheels. The front suspension utilizes a multi-link design with a transverse stabilizer bar, while the rear suspension employs a trapezoidal lever setup, also with a stabilizer bar. Crucially, this variant was equipped with Audi’s adaptive air suspension, which allowed the ride height to be adjusted for improved comfort or handling. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power. The front brakes measure 356 mm in diameter, while the rear brakes are 330 mm. ABS (Anti-lock Braking System) is standard, enhancing braking performance and stability.
Market Reception & Comparison
The A8 L 3.0 TDI was generally well-received by automotive critics. It was praised for its refined driving experience, comfortable ride, and fuel efficiency. The diesel engine’s torque was a particular highlight, making the car effortless to drive in a variety of conditions. Compared to the 2.8 FSI, the 3.0 TDI offered significantly more performance and a more luxurious feel. Compared to the 4.2 TDI, it provided a more economical option without sacrificing too much in terms of refinement. Fuel economy figures of around 28 US mpg combined were competitive for a vehicle of this size and class. Reliability was generally good, although diesel particulate filter (DPF) issues could occasionally arise, particularly with frequent short journeys.
Legacy
The Audi A8 L 3.0 TDI V6 quattro Tiptronic remains a desirable used car today. Its combination of luxury, performance, and efficiency continues to appeal to buyers seeking a sophisticated grand tourer. The CPNA engine is known for its durability, although regular maintenance is essential. The Tiptronic transmission is also generally reliable, provided it has been serviced according to Audi’s recommendations. While newer A8 models offer even more advanced technology and features, the D4 generation A8 L 3.0 TDI represents a sweet spot in terms of value and driving experience, offering a compelling blend of luxury and practicality.
