The Audi A6 Sedan (C8) 45 TDI V6, produced from 2018 to 2020, represents a sophisticated blend of performance, efficiency, and technology within the eighth generation (C8) of Audi’s flagship executive sedan. Positioned as a mid-range offering in the A6 lineup, this variant catered to buyers seeking a balance between spirited driving and economical operation, particularly in European markets where diesel engines remained highly popular. It incorporated a 48-volt mild hybrid system, enhancing fuel efficiency and providing a smoother driving experience. The 45 TDI V6 utilized Audi’s quattro all-wheel-drive system, ensuring confident handling in various weather conditions.
Technical Specifications
| Brand | Audi |
| Model | A6 |
| Generation | A6 Sedan (C8) |
| Type (Engine) | 45 TDI V6 (231 Hp) quattro Mild Hybrid Tiptronic |
| Start of production | 2018 |
| End of production | December, 2020 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Combined fuel consumption (WLTP) | 7.3-7.8 l/100 km (32.2 – 30.2 US mpg) |
| CO2 emissions (WLTP) | 192-203 g/km |
| Fuel consumption (urban) | 6.2-6.4 l/100 km (37.9 – 36.8 US mpg) |
| Fuel consumption (extra urban) | 5.2-5.4 l/100 km (45.2 – 43.6 US mpg) |
| Fuel consumption (combined) | 5.6-5.8 l/100 km (42 – 40.6 US mpg) |
| CO2 emissions | 146-150 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.3 sec |
| Acceleration 0 – 62 mph | 6.3 sec |
| Acceleration 0 – 60 mph | 6 sec (Calculated) |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 7.9 kg/Hp |
| Weight-to-torque ratio | 3.7 kg/Nm |
| Power | 231 Hp @ 3250-4750 rpm |
| Torque | 500 Nm @ 1750-3250 rpm (368.78 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | DDVE |
| Engine displacement | 2967 cm3 (181.06 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 6.1 l (6.45 US qt | 5.37 UK qt) |
| Coolant capacity | 11.6 l (12.26 US qt | 10.21 UK qt) |
| Kerb Weight | 1825 kg (4023.44 lbs.) |
| Max. weight | 2475 kg (5456.44 lbs.) |
| Max load | 650 kg (1433 lbs.) |
| Trunk (boot) space – minimum | 530 l (18.72 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal | 13.86 UK gal) |
| Max. roof load | 90 kg (198.42 lbs.) |
| Permitted trailer load with brakes (8%) | 2000 kg (4409.25 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4939 mm (194.45 in.) |
| Width | 1886 mm (74.25 in.) |
| Width including mirrors | 2110 mm (83.07 in.) |
| Height | 1457 mm (57.36 in.) |
| Wheelbase | 2924 mm (115.12 in.) |
| Front track | 1630 mm (64.17 in.) |
| Rear track | 1617 mm (63.66 in.) |
| Number of gears and type of gearbox | 8 gears, automatic transmission Tiptronic |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
Powertrain & Engine Architecture
At the heart of the A6 45 TDI V6 lies the DDVE engine, a 3.0-liter V6 diesel engine. This engine is part of Audi’s modular engine family and features a cast iron block with aluminum cylinder heads. It employs a common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. The engine is turbocharged with a single variable geometry turbocharger (VGT) and intercooled, boosting power and torque. The 48V mild hybrid system incorporates a belt starter generator (BSG) and a small lithium-ion battery. The BSG allows for extended engine-off coasting, regenerative braking, and smoother start-stop operation, contributing to improved fuel economy. The transmission is an 8-speed Tiptronic automatic, known for its smooth shifts and responsive performance. This transmission is designed to handle the engine’s substantial torque output efficiently.
Driving Characteristics
The 231 horsepower and 369 lb-ft of torque produced by the 45 TDI V6 provide ample power for confident acceleration and effortless highway cruising. The 0-60 mph sprint takes approximately 6 seconds, making it a reasonably quick executive sedan. The Tiptronic transmission is well-tuned, offering smooth and timely gear changes. While not as overtly sporty as some of its competitors, the A6 45 TDI delivers a refined and comfortable driving experience. The quattro all-wheel-drive system provides excellent traction in all conditions, enhancing stability and control. Compared to the more powerful 50 TDI variant, the 45 TDI offers a more balanced approach, prioritizing fuel efficiency and everyday usability over outright performance. The manual transmission options, available in other A6 trims, offered a more engaging driving experience, but the Tiptronic provided greater convenience for many drivers.
Equipment & Trim Levels
The A6 45 TDI V6 typically came well-equipped as standard. Features included Audi’s Virtual Cockpit digital instrument cluster, a 10.1-inch touchscreen infotainment system with MMI Navigation plus, leather upholstery, three-zone automatic climate control, and a suite of driver-assistance systems such as adaptive cruise control and lane departure warning. Optional extras included a Bang & Olufsen sound system, massaging front seats, a head-up display, and various styling packages. Trim levels varied by market, but generally, the 45 TDI V6 sat in the middle of the A6 range, offering a good balance of luxury and features without the premium price tag of the higher-spec models.
Chassis & Braking
The A6 C8 utilizes a longitudinally mounted front engine and all-wheel drive layout. The suspension consists of independent multi-link setups at both the front and rear, providing a comfortable ride and precise handling. The steering is an electromechanical power steering system, offering a responsive and well-weighted feel. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power. The electronic stability control (ESC) system works in conjunction with the ABS to maintain control during emergency braking situations.
Market Reception & Comparison
The Audi A6 45 TDI V6 was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and advanced technology. Fuel economy was a strong point, particularly compared to gasoline-powered rivals. However, some critics noted that the diesel engine could be slightly noisy under hard acceleration. Compared to the more powerful A6 50 TDI, the 45 TDI offered a more affordable entry point into the A6 range, while still providing a luxurious and capable driving experience. Against competitors like the BMW 5 Series and Mercedes-Benz E-Class, the A6 45 TDI V6 held its own, offering a compelling combination of performance, efficiency, and technology.
Legacy
The DDVE engine, found in the A6 45 TDI V6, has proven to be a relatively reliable powertrain. While diesel engines are inherently more complex than their gasoline counterparts, the DDVE has demonstrated good durability with proper maintenance. The mild hybrid system has also proven to be robust. On the used car market, the A6 45 TDI V6 represents a good value proposition, offering a luxurious and well-equipped executive 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. Regular servicing and adherence to manufacturer-recommended maintenance schedules are crucial for ensuring the long-term reliability of this powertrain.
