The Audi A8 (D4, 4H facelift) 3.0 TDI ultra quattro Tiptronic represents a refinement of Audi’s flagship sedan, produced from 2015 to 2017. This variant, positioned as a fuel-efficient option within the D4 generation (2010-2017), aimed to deliver a balance of luxury, performance, and economy. The “ultra” designation signified Audi’s efforts to reduce weight and optimize efficiency without significantly compromising the A8’s core attributes. It sat in the mid-range of the A8 lineup, offering a step down in outright power from the 4.0 TDI but providing superior fuel economy and a more accessible price point compared to the range-topping models.
Technical Specifications
| Brand | Audi |
| Model | A8 |
| Generation | A8 (D4,4H facelift 2013) |
| Type (Engine) | 3.0 TDI V6 ultra (262 Hp) quattro Tiptronic |
| Start of production | 2015 year |
| End of production | 2017 year |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban | 7.2 l/100 km (32.7 US mpg, 39.2 UK mpg, 13.9 km/l) |
| Fuel consumption (economy) – extra urban | 4.8 l/100 km (49 US mpg, 58.9 UK mpg, 20.8 km/l) |
| Fuel consumption (economy) – combined | 5.7 l/100 km (41.3 US mpg, 49.6 UK mpg, 17.5 km/l) |
| CO2 emissions | 149 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5.9 sec |
| Acceleration 0 – 62 mph | 5.9 sec |
| Acceleration 0 – 60 mph | 5.6 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 7.2 kg/Hp, 139.4 Hp/tonne |
| Weight-to-torque ratio | 3.2 kg/Nm, 308.5 Nm/tonne |
| Power | 262 Hp @ 4000-4250 rpm |
| Power per litre | 88.3 Hp/l |
| Torque | 580 Nm @ 1750-2500 rpm (427.79 lb.-ft. @ 1750-2500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | CTBD |
| 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 | 16.8:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 6.4 l (6.76 US qt | 5.63 UK qt) |
| Kerb Weight | 1880 kg (4144.69 lbs.) |
| Max. weight | 2570 kg (5665.88 lbs.) |
| Max load | 690 kg (1521.19 lbs.) |
| Trunk (boot) space – minimum | 490 l (17.3 cu. ft.) |
| Fuel tank capacity | 82 l (21.66 US gal | 18.04 UK gal) |
| 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 | 5135 mm (202.17 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 | 1000 mm (39.37 in.) |
| Rear overhang | 1143 mm (45 in.) |
| 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 |
| Tires size | 235/55 R18 |
| Wheel rims size | 8J x 18 |
Powertrain & Engine Architecture
The heart of the A8 3.0 TDI ultra is the CTBD engine, a 3.0-liter V6 turbodiesel. This engine is part of Audi’s modular engine family and features a common-rail direct injection system operating at extremely high pressures (2000 bar) for optimized combustion. The engine utilizes a single turbocharger with variable geometry turbine (VGT) technology, enhancing responsiveness and broadening the torque curve. The “ultra” designation involved several weight-saving measures within the engine itself, including optimized aluminum components. The engine produces 262 horsepower at 4000-4250 rpm and a substantial 580 Nm (427.79 lb-ft) of torque between 1750 and 2500 rpm. This torque output is a key characteristic of modern diesel engines, providing strong pulling power at low engine speeds. The engine is paired with Audi’s eight-speed Tiptronic automatic transmission. This transmission offers both fully automatic operation and the ability for the driver to manually select gears, providing a degree of control. The Tiptronic transmission is known for its smooth and quick shifts.
Driving Characteristics
The 3.0 TDI ultra offers a refined and comfortable driving experience. While not as overtly sporty as the higher-powered A8 variants, it delivers ample performance for everyday driving and long-distance cruising. The 5.9-second 0-60 mph acceleration time is respectable for a large luxury sedan. The Tiptronic transmission is well-tuned to the engine’s characteristics, providing smooth gear changes and keeping the engine within its optimal torque band. Compared to the 4.0 TDI, the 3.0 TDI ultra feels less urgent in acceleration, but the difference is often imperceptible in normal driving conditions. The eight-speed transmission’s gear ratios are optimized for both fuel efficiency and performance, with taller gears for highway cruising and shorter gears for quicker acceleration. The quattro all-wheel-drive system provides excellent traction and stability in all weather conditions.
Equipment & Trim Levels
The A8 3.0 TDI ultra typically came well-equipped as standard. Features included leather upholstery, tri-zone automatic climate control, a premium sound system, and a comprehensive suite of safety features such as adaptive cruise control, lane departure warning, and blind-spot monitoring. The infotainment system featured a large central display screen and Audi’s MMI touch interface. Optional extras included features like massaging seats, a head-up display, and advanced driver-assistance systems. Interior trim options varied, with choices in wood veneers and aluminum accents. The standard upholstery was typically high-quality leather, with extended leather packages available as an option.
Chassis & Braking
The A8 (D4) features an independent suspension system on all four wheels. The front suspension utilizes a multi-link design, while the rear suspension employs a trapezoidal link setup. This configuration provides a comfortable ride and precise handling. The “ultra” models often featured slightly stiffer suspension tuning compared to the standard A8 to improve handling without sacrificing comfort. Braking duties are handled by ventilated disc brakes on all four wheels. The A8 is equipped with Audi’s ABS (Anti-lock Braking System), electronic stability control (ESC), and traction control systems. The braking system provides strong and consistent stopping power.
Market Reception & Comparison
The A8 3.0 TDI ultra was generally well-received by automotive critics. It was praised for its fuel efficiency, comfortable ride, and refined interior. Critics noted that while it didn’t offer the same level of performance as the higher-powered A8 variants, it provided a compelling value proposition for buyers prioritizing economy and comfort. Compared to the 4.0 TDI, the 3.0 TDI ultra offered significantly better fuel economy, making it a more attractive option for those who frequently drive long distances. The 3.0 TDI ultra also undercut the 4.0 TDI in price, making it more accessible to a wider range of buyers. Against competitors like the BMW 730d and Mercedes-Benz S350d, the A8 3.0 TDI ultra held its own in terms of refinement, technology, and fuel efficiency.
Legacy
The 3.0 TDI engine, in various iterations, has proven to be a reliable and durable powertrain. While diesel engines, in general, have faced increased scrutiny regarding emissions, the CTBD engine in the A8 3.0 TDI ultra is generally considered to be relatively robust. Proper maintenance, including regular oil changes and adherence to recommended service intervals, is crucial for long-term reliability. On the used car market, the A8 3.0 TDI ultra represents a good value proposition, offering a luxurious and well-equipped sedan at a reasonable price. However, potential buyers should be aware of the potential for diesel particulate filter (DPF) issues, particularly if the vehicle has been primarily used for short trips. Overall, the A8 3.0 TDI ultra remains a desirable and capable luxury sedan.
