The Audi A6 Avant (C8) 45 TDI V6, produced from December 2020 to May 2023, represents a sophisticated blend of performance, efficiency, and practicality within the Audi A6 lineup. This variant, positioned as a mid-range offering, combines a potent turbocharged diesel engine with a mild hybrid system and Audi’s renowned quattro all-wheel-drive technology. It’s built on the MLB Evo platform (longitudinal modular platform) shared with other Volkswagen Group vehicles, and specifically caters to buyers seeking a premium wagon experience with strong fuel economy and capable all-weather performance. The “Avant” designation signifies Audi’s station wagon (estate) body style, a popular choice in European markets where practicality is highly valued.
Technical Specifications
| Brand | Audi |
| Model | A6 |
| Generation | A6 Avant (C8) |
| Type | 45 TDI V6 (245 Hp) Mild Hybrid quattro ultra S tronic |
| Start of production | December, 2020 |
| End of production | May, 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 6.3-7.1 l/100 km (37.3 – 33.1 US mpg, 44.8 – 39.8 UK mpg, 15.9 – 14.1 km/l) |
| CO2 emissions (WLTP) | 166-185 g/km |
| Fuel consumption (urban) | 7.7-7.9 l/100 km (30.5 – 29.8 US mpg, 36.7 – 35.8 UK mpg, 13 – 12.7 km/l) |
| Fuel consumption (extra urban) | 4.9-5.2 l/100 km (48 – 45.2 US mpg, 57.6 – 54.3 UK mpg, 20.4 – 19.2 km/l) |
| Fuel consumption (combined) | 5.9-6.2 l/100 km (39.9 – 37.9 US mpg, 47.9 – 45.6 UK mpg, 16.9 – 16.1 km/l) |
| CO2 emissions (NEDC) | 156-164 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.4 sec |
| Acceleration 0 – 62 mph | 6.4 sec |
| Acceleration 0 – 60 mph | 6.1 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6d-ISC-FCM |
| Weight-to-power ratio | 7.7 kg/Hp, 129.6 Hp/tonne |
| Weight-to-torque ratio | 3.8 kg/Nm, 264.6 Nm/tonne |
| 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.) |
| Engine Power | 245 Hp @ 3500-4750 rpm |
| Engine Torque | 500 Nm @ 1500-3250 rpm (368.78 lb.-ft. @ 1500-3250 rpm) |
| 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 |
| 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 capacity | 15.7 l (16.59 US qt | 13.81 UK qt) |
| Kerb Weight | 1890 kg (4166.74 lbs) |
| Max. weight | 2570 kg (5665.88 lbs) |
| Max load | 680 kg (1499.14 lbs) |
| Trunk space (min) | 550 l (19.42 cu. ft.) |
| Trunk space (max) | 1660 l (58.62 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal | 13.86 UK gal) |
| AdBlue tank capacity | 22 l (5.81 US gal | 4.84 UK gal) |
| Max. roof load | 100 kg (220.46 lbs) |
| Permitted trailer load (8%) | 2000 kg (4409.25 lbs) |
| Permitted trailer load (12%) | 2000 kg (4409.25 lbs) |
| Permitted trailer load (unbraked) | 750 kg (1653.47 lbs) |
| Permitted towbar download | 95 kg (209.44 lbs) |
| Length | 4939 mm (194.45 in.) |
| Width | 1886 mm (74.25 in.) |
| Width (including mirrors) | 2110 mm (83.07 in.) |
| Height | 1494 mm (58.82 in.) |
| Wheelbase | 2924 mm (115.12 in.) |
| Front track | 1630 mm (64.17 in.) |
| Rear track | 1617 mm (63.66 in.) |
| Front overhang | 920 mm (36.22 in.) |
| Rear overhang | 1095 mm (43.11 in.) |
| Drag coefficient (Cd) | 0.29 |
| Minimum turning circle | 12.1 m (39.7 ft) |
| Front brakes | Ventilated discs, 338 mm |
| Rear brakes | Ventilated discs, 330 mm |
| Gearbox | 7 gears, automatic transmission S tronic |
INTRODUCTION
The Audi A6 Avant (C8) 45 TDI V6 Mild Hybrid quattro ultra, launched in late 2020, is a key variant within the fourth generation (C8) of Audi’s flagship executive wagon. It builds upon the success of previous A6 Avant models, offering a compelling package for buyers prioritizing space, comfort, and efficiency. The “45 TDI” designation indicates the engine’s power output relative to Audi’s internal naming convention, while “quattro ultra” signifies an on-demand all-wheel-drive system designed to optimize fuel economy. This model was primarily aimed at the European market, where wagons remain a popular choice, but limited numbers were also available in other regions.
Powertrain & Engine Architecture
At the heart of the A6 Avant 45 TDI lies the EA897evo2 3.0-liter V6 turbocharged diesel engine, identified by the engine code DMGH. This engine is a significant evolution of Audi’s long-standing V6 diesel family, incorporating advanced technologies to improve efficiency and reduce emissions. It features a common-rail direct injection system operating at extremely high pressures (2500 bar) for optimized fuel atomization and combustion. The engine utilizes a variable geometry turbocharger (VGT) to provide strong torque across a wide RPM range. The mild hybrid system, utilizing a 48V electrical system, incorporates a belt-driven starter-generator (BSG) that enables features like extended engine-off coasting, regenerative braking, and smoother start-stop operation. The BSG can recover up to 14 kW of energy during deceleration. The engine is paired with Audi’s seven-speed S tronic dual-clutch transmission, known for its quick and seamless gear changes. This transmission is specifically tuned to complement the engine’s torque characteristics, providing responsive acceleration and efficient cruising.
Driving Characteristics
The 45 TDI V6 Automatic combination delivers a refined and effortless driving experience. The engine produces a substantial 500 Nm (368.78 lb-ft) of torque from just 1500 rpm, providing strong acceleration in everyday driving situations. The S tronic transmission contributes to a 0-60 mph time of around 6.1 seconds. While not as overtly sporty as some of the higher-powered A6 variants, the 45 TDI offers ample performance for overtaking and highway cruising. The quattro ultra all-wheel-drive system intelligently distributes torque between the front and rear axles as needed, enhancing traction and stability in adverse weather conditions. The gear ratios are optimized for both fuel efficiency and responsiveness, with a relatively tall seventh gear for relaxed highway driving. Compared to the manual transmission versions of the same engine, the S tronic offers smoother shifts and reduced driver fatigue, although some purists may prefer the greater control of a manual gearbox.
Equipment & Trim Levels
The A6 Avant 45 TDI V6 typically came well-equipped as standard. Features included Audi’s Virtual Cockpit digital instrument cluster, a touchscreen infotainment system with navigation, leather upholstery, tri-zone automatic climate control, and a suite of driver-assistance systems such as adaptive cruise control, lane departure warning, and automatic emergency braking. Optional extras included features like a Bang & Olufsen premium sound system, massaging front seats, a head-up display, and air suspension for an even more comfortable ride. Interior trim levels varied, with options for different wood or aluminum inlays. The standard upholstery was typically leather/Alcantara combination, with full leather available as an upgrade.
Chassis & Braking
The A6 Avant’s chassis is designed to balance comfort and handling. The front suspension utilizes a multi-link setup, while the rear also employs a multi-link design. Air suspension was available as an option, providing adjustable ride height and damping for enhanced comfort and control. The braking system consists of ventilated discs on all four wheels, with larger discs at the front to handle the increased stopping power. The A6 Avant 45 TDI typically featured 338mm front discs and 330mm rear discs. ABS (Anti-lock Braking System) and electronic stability control are standard features, ensuring safe and controlled braking in all conditions.
Market Reception & Comparison
The A6 Avant 45 TDI V6 was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, spacious interior, and practical wagon body style. Compared to the more powerful 50 TDI variant, the 45 TDI offered a more balanced combination of performance and fuel economy. The 45 TDI also represented a more sensible choice than the petrol-powered A6 variants for drivers covering long distances. Fuel economy figures of 6.3-7.1 l/100 km (37.3 – 33.1 US mpg) were considered competitive for a vehicle of this size and class. Reliability reports have generally been positive, although, as with any modern diesel, the diesel particulate filter (DPF) and AdBlue system require regular maintenance.
Legacy
The Audi A6 Avant (C8) 45 TDI V6 Mild Hybrid quattro ultra represents a high point in Audi’s wagon engineering. The EA897evo2 engine, while subject to ongoing scrutiny regarding diesel emissions, is a robust and efficient powerplant when properly maintained. The combination of the mild hybrid system and S tronic transmission contributes to improved fuel economy and reduced emissions. On the used car market, these models hold their value well, particularly those with low mileage and a full service history. The A6 Avant continues to be a popular choice for buyers seeking a premium, practical, and comfortable wagon, and the 45 TDI variant offers a compelling blend of performance, efficiency, and value.
