Technical Specifications
| Brand | Audi |
| Model | A8 |
| Generation | A8L (D5) |
| Type (Engine) | 50 TDI V6 (286 Hp) Mild Hybrid quattro tiptronic |
| Start of production | 2017 |
| End of production | 2019 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 6.3-6.4 l/100 km (37.3 – 36.8 US mpg) |
| Fuel consumption (extra urban) | 5.2-5.5 l/100 km (45.2 – 42.8 US mpg) |
| Fuel consumption (combined) | 5.6-5.8 l/100 km (42 – 40.6 US mpg) |
| CO2 emissions | 146-152 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 kg/Hp |
| Weight-to-torque ratio | 3.3 kg/Nm |
| Net battery capacity | 0.5 kWh |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Battery weight | 10 kg (22.05 lbs) |
| Battery location | Under the trunk |
| Recuperation output | 14 kW |
| Electric motor power | 8 Hp |
| Electric motor Torque | 60 Nm (44.25 lb.-ft.) |
| Electric motor location | Front, Longitudinal |
| Power | 286 Hp @ 3750-4000 rpm |
| Torque | 600 Nm @ 1250-3250 rpm (442.54 lb.-ft. @ 1250-3250 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | EA897evo2 / DDVC |
| 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 | 16:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6.1 l (6.45 US qt | 5.37 UK qt) |
| Coolant | 12.9 l (13.63 US qt | 11.35 UK qt) |
| Kerb Weight | 2000 kg (4409.25 lbs) |
| Max. weight | 2700 kg (5952.48 lbs) |
| Max load | 700 kg (1543.24 lbs) |
| Trunk (boot) space – minimum | 505 l (17.83 cu. ft.) |
| Fuel tank capacity | 72 l (19.02 US gal | 15.84 UK gal) |
| AdBlue tank | 24 l (6.34 US gal | 5.28 UK gal) |
| Max. roof load | 100 kg (220.46 lbs) |
| Permitted trailer load with brakes (8%) | 2300 kg (5070.63 lbs) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs) |
| Length | 5302 mm (208.74 in.) |
| Width | 1945 mm (76.57 in.) |
| Height | 1485 mm (58.46 in.) |
| Wheelbase | 3128 mm (123.15 in.) |
| Gears/Gearbox | 8 gears, automatic transmission tiptronic |
The Audi A8L (D5) 50 TDI, produced from 2017 to 2019, represents a significant iteration of Audi’s flagship luxury sedan. Positioned as a mid-range offering within the D5 A8L generation, this variant combined a potent 3.0-liter V6 turbodiesel engine with a mild hybrid system and Audi’s renowned quattro all-wheel drive, paired with an eight-speed tiptronic automatic transmission. It aimed to balance performance, efficiency, and luxury, appealing to buyers seeking a refined grand touring experience. The ‘L’ designation signifies the long-wheelbase version, prioritizing rear passenger space and comfort. This model played a crucial role in establishing the D5 A8L as a technological showcase for Audi, introducing advanced features like the MHEV system and updated driver-assistance technologies.
Powertrain & Engine Architecture
At the heart of the A8L 50 TDI lies the EA897evo2 3.0-liter V6 turbodiesel engine, designated with the code DDVC. This engine utilizes a sophisticated common-rail direct injection system operating at extremely high pressures to optimize combustion efficiency and reduce emissions. The engine features a single turbocharger with variable geometry turbine (VGT) technology, providing a broad torque curve and responsive acceleration. The valvetrain employs dual overhead camshafts (DOHC) with four valves per cylinder. The mild-hybrid system, a 48-volt setup, incorporates a belt-driven starter-generator (BSG) that enables features like extended engine-off coasting, regenerative braking, and smoother start-stop operation. The eight-speed tiptronic automatic transmission is a torque-converter type, known for its smooth shifts and responsiveness. It’s programmed to prioritize comfort and efficiency, but also offers manual shift capability via steering wheel paddles or the gear selector.
Driving Characteristics
The A8L 50 TDI delivers a refined and effortless driving experience. The 600 Nm (442.54 lb-ft) of torque available from just 1250 rpm provides strong acceleration in all situations. While not as overtly sporty as some of its competitors, the 5.9-second 0-60 mph time is more than adequate for a luxury sedan of this size. The tiptronic transmission is well-matched to the engine’s characteristics, providing smooth and seamless gear changes. The quattro all-wheel-drive system ensures excellent traction and stability in all weather conditions. Compared to the higher-output 55 TDI variant, the 50 TDI offers a slightly less aggressive driving experience, but it compensates with improved fuel economy. The automatic transmission, while refined, doesn’t offer the same level of engagement as the available manual transmissions in some European markets.
Equipment & Trim Levels
The A8L 50 TDI came standard with a comprehensive array of luxury features, including leather upholstery, heated and ventilated front seats with massage function, a panoramic sunroof, a premium sound system, and a fully digital instrument cluster (Audi Virtual Cockpit). Standard safety features included adaptive cruise control, lane-keeping assist, and automatic emergency braking. Optional extras included a rear-seat entertainment system, a head-up display, and advanced driver-assistance packages. Interior trim options ranged from wood veneers to aluminum accents, allowing buyers to personalize the cabin to their preferences. The A8L generally offered a higher level of standard equipment than the standard-wheelbase A8.
Chassis & Braking
The A8L 50 TDI utilizes an independent multi-link suspension system at both the front and rear axles, enhanced by Audi’s adaptive air suspension. This system automatically adjusts the ride height and damping characteristics based on road conditions and driving style, providing a comfortable and controlled ride. The car is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) and electronic stability control (ESC) are standard features. The long wheelbase and sophisticated suspension contribute to excellent ride quality and stability, even on uneven surfaces.
Market Reception & Comparison
The A8L 50 TDI was generally well-received by automotive critics, who praised its refined driving experience, luxurious interior, and advanced technology. The diesel engine was noted for its quiet operation and impressive fuel economy. Compared to the petrol-powered A8L variants, the 50 TDI offered significantly better fuel efficiency, making it a popular choice for long-distance drivers. However, some critics noted that the diesel engine lacked the outright performance of the higher-output petrol engines. The A8L 50 TDI’s fuel economy figures of 5.6-5.8 l/100 km (42-40.6 US mpg) were competitive within its segment.
Legacy
The Audi A8L (D5) 50 TDI represents a high point in diesel luxury sedan technology. The EA897evo2 engine, while subject to increasing scrutiny regarding diesel emissions, proved to be a reliable and durable powertrain when properly maintained. In the used car market, these models continue to be sought after by buyers who appreciate their blend of luxury, performance, and efficiency. The mild-hybrid system, while relatively simple by today’s standards, paved the way for Audi’s more advanced hybrid and electric vehicle technologies. Regular maintenance, including adherence to recommended oil change intervals and proper AdBlue fluid replenishment, is crucial for ensuring the long-term reliability of this powertrain.
