The Audi A6 Avant (C8, facelift) 40 TDI, produced from June 2023 to March 2025, represents a compelling blend of practicality, efficiency, and technology within the executive wagon segment. Positioned as a mid-range offering in the C8 A6 Avant lineup, this variant caters to buyers seeking a balance between performance and fuel economy. It builds upon the foundation of the C8 platform (shared with the A7 Sportback) and incorporates a mild hybrid system to enhance efficiency and reduce emissions. The “40 TDI” designation signifies its engine output and diesel fuel type, while the “S tronic” label denotes the use of Audi’s dual-clutch transmission. This model primarily targets the European market, where wagons remain highly popular, offering a sophisticated alternative to SUVs.
Technical Specifications
| Brand | Audi |
| Model | A6 |
| Generation | A6 Avant (C8, facelift 2023) |
| Type (Engine) | 40 TDI (204 Hp) Mild Hybrid S tronic |
| Start of production | June, 2023 |
| End of production | March, 2025 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 5.4-6.2 l/100 km (43.6 – 37.9 US mpg, 52.3 – 45.6 UK mpg, 18.5 – 16.1 km/l) |
| CO2 emissions (WLTP) | 141-162 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 8.1 sec |
| Acceleration 0 – 62 mph | 8.1 sec |
| Acceleration 0 – 60 mph | 7.7 sec |
| Maximum speed | 241 km/h (149.75 mph) |
| Emission standard | Euro 6e |
| Weight-to-power ratio | 8.4 kg/Hp, 119.6 Hp/tonne |
| Weight-to-torque ratio | 4.3 kg/Nm, 234.6 Nm/tonne |
| Net (usable) battery capacity | 0.15 kWh |
| Battery voltage | 12 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Battery location | Under the front hood |
| Recuperation output | 6 kW |
| Electric motor power | 3 Hp |
| Electric motor Torque | 60 Nm (44.25 lb.-ft.) |
| Electric motor location | Front, Longitudinal |
| Power | 204 Hp @ 3800-4200 rpm |
| Torque | 400 Nm @ 1750-3250 rpm (295.02 lb.-ft. @ 1750-3250 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | EA288evo |
| Engine displacement | 1968 cm3 (120.09 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 81 mm (3.19 in.) |
| Piston Stroke | 95.5 mm (3.76 in.) |
| Compression ratio | 15.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 5.5 l (5.81 US qt | 4.84 UK qt) |
| Coolant | 12.1 l (12.79 US qt | 10.65 UK qt) |
| Kerb Weight | 1705 kg (3758.88 lbs.) |
| Max. weight | 2330 kg (5136.77 lbs.) |
| Max load | 625 kg (1377.89 lbs.) |
| Trunk (boot) space – minimum | 565 l (19.95 cu. ft.) |
| Trunk (boot) space – maximum | 1680 l (59.33 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal | 13.86 UK gal) |
| AdBlue tank | 12 l (3.17 US gal | 2.64 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (8%) | 2000 kg (4409.25 lbs.) |
| Permitted trailer load with brakes (12%) | 2000 kg (4409.25 lbs.) |
| Permitted trailer load without brakes | 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 (Back) track | 1617 mm (63.66 in.) |
| Front overhang | 920 mm (36.22 in.) |
| Rear overhang | 1095 mm (43.11 in.) |
| Drag coefficient (Cd) | 0.28 |
| Minimum turning circle (turning diameter) | 12.1 m (39.7 ft.) |
| Approach angle | 13.7° |
| Departure angle | 16.9° |
| Drivetrain Architecture | ICE and electric motor drive the front wheels in mixed mode. |
| Drive wheel | Front wheel drive |
| Number of gears and type of gearbox | 7 gears, automatic transmission S tronic |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs, 318 mm |
| Rear brakes | Disc, 300 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 225/60 R17; 225/55 R18; 245/45 R19; 255/40 R20; 255/35 R21 |
| Wheel rims size | 7.5J x 17; 8J x 18; 8.5J x 19; 8.5J x 20; 8.5J x 21 |
INTRODUCTION
The Audi A6 Avant (C8, facelift) 40 TDI, launched in mid-2023, represents a significant update to Audi’s popular executive wagon. This iteration falls within the C8 generation, which debuted in 2018, and benefits from a comprehensive refresh including revised styling, updated technology, and enhanced efficiency. The 40 TDI variant, powered by a 2.0-liter turbocharged diesel engine, occupies a crucial position in the A6 Avant range, offering a balance between performance, fuel economy, and price. It’s designed to appeal to buyers who prioritize practicality and long-distance comfort without sacrificing the premium feel associated with the Audi brand. The facelift brought subtle but noticeable changes to the exterior, interior, and infotainment system, further refining the A6 Avant’s appeal.
Powertrain & Engine Architecture
At the heart of the A6 Avant 40 TDI lies the EA288evo 2.0-liter inline-four cylinder diesel engine. This engine, a mainstay in the Volkswagen Group’s lineup, utilizes a common rail direct injection system operating at extremely high pressures to optimize combustion. The engine benefits from a variable geometry turbocharger (VGT) and intercooler, contributing to its responsive power delivery. The engine produces 204 horsepower at 3800-4200 rpm and 400 Nm (295 lb-ft) of torque between 1750-3250 rpm. The “evo” designation indicates an evolution of the EA288 family, incorporating improvements in fuel efficiency and emissions reduction.
Crucially, this variant incorporates a 48-volt mild hybrid system. This system utilizes a belt starter generator (BSG) and a small lithium-ion battery (0.15 kWh) to enable features like extended start-stop operation, coasting with the engine off, and regenerative braking, recovering energy during deceleration. The BSG also provides a small power boost during acceleration. The engine is paired with Audi’s seven-speed S tronic dual-clutch transmission, known for its quick and smooth gear changes. This transmission offers both automatic and manual shift modes, allowing drivers to tailor the driving experience to their preferences.
Driving Characteristics
The A6 Avant 40 TDI S tronic delivers a refined and comfortable driving experience. While not overtly sporty, the engine provides ample power for everyday driving and effortless highway cruising. The S tronic transmission contributes to brisk acceleration, with 0-60 mph taking approximately 7.7 seconds. The mild hybrid system enhances responsiveness by filling in torque gaps during gear changes. The gear ratios are tuned for a balance between fuel efficiency and performance, with taller gears prioritizing economy at cruising speeds. Compared to higher-output A6 Avant models (like the 50 TDI), the 40 TDI feels less urgent in acceleration, but its lower weight and efficient engine contribute to better fuel economy. The front-wheel-drive configuration provides good traction in most conditions, although all-wheel drive (quattro) is available as an option.
Equipment & Trim Levels
The A6 Avant 40 TDI typically comes well-equipped as standard. Features generally include Audi’s Virtual Cockpit digital instrument cluster, a touchscreen infotainment system with Apple CarPlay and Android Auto compatibility, leather upholstery, three-zone automatic climate control, and a suite of driver-assistance systems such as lane departure warning and automatic emergency braking. Optional extras include a head-up display, adaptive cruise control, a premium sound system, and various interior trim upgrades. Trim levels vary by market, but generally offer increasing levels of luxury and technology. The base trim focuses on essential features, while higher trims add more premium materials and advanced driver aids.
Chassis & Braking
The A6 Avant 40 TDI utilizes an independent multi-link suspension setup at both the front and rear axles, providing a comfortable and controlled ride. The suspension is tuned to prioritize comfort, absorbing bumps and imperfections in the road surface effectively. The front brakes consist of ventilated discs measuring 318mm, while the rear brakes are solid discs measuring 300mm. ABS (Anti-lock Braking System) is standard, along with electronic stability control. The steering is an electric power-assisted rack and pinion system, offering precise and responsive control.
Market Reception & Comparison
The A6 Avant 40 TDI has been generally well-received by automotive critics. It’s praised for its comfortable ride, refined interior, and efficient engine. Fuel economy is a strong point, with combined WLTP figures ranging from 5.4 to 6.2 l/100 km. Compared to the more powerful 50 TDI variant, the 40 TDI offers a more affordable entry point into the A6 Avant range, albeit with slightly reduced performance. The 40 TDI also provides a more economical alternative to petrol-powered A6 Avant models. Reliability has been generally good, although diesel engines can be more susceptible to issues with the diesel particulate filter (DPF) if primarily used for short journeys.
Legacy
The EA288 engine family, including the version found in the A6 Avant 40 TDI, has proven to be relatively durable and reliable when properly maintained. The mild hybrid system adds a layer of complexity, but early reports suggest it has been robust. In the used car market, the A6 Avant 40 TDI is likely to hold its value reasonably well, particularly examples with a full service history and low mileage. Its blend of practicality, efficiency, and premium features makes it an attractive option for buyers seeking a versatile and comfortable executive wagon.
