The Audi A6 Allroad quattro (C8) 40 TDI, produced from December 2020 to March 2025, represents a compelling blend of luxury, practicality, and all-weather capability within the A6 family. Positioned as a mid-range offering in the Allroad lineup, this variant combines a 2.0-liter turbocharged diesel engine with a mild hybrid system and Audi’s renowned quattro all-wheel-drive system, paired with a seven-speed S tronic dual-clutch transmission. It caters to buyers seeking a versatile wagon capable of both comfortable long-distance cruising and tackling challenging road conditions. The C8 generation A6 Allroad builds upon the established reputation of its predecessors, offering increased space, advanced technology, and refined driving dynamics.
Technical Specifications
| Brand | Audi |
| Model | A6 |
| Generation | A6 Allroad quattro (C8) |
| Type (Engine) | 40 TDI (204 Hp) Mild Hybrid quattro ultra S tronic |
| Start of production | December, 2020 |
| End of production | March, 2025 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Station wagon (estate), Crossover |
| Seats | 5 |
| Doors | 5 |
| Combined fuel consumption (WLTP) | 5.8-6.5 l/100 km (40.6 – 36.2 US mpg, 48.7 – 43.5 UK mpg, 17.2 – 15.4 km/l) |
| CO2 emissions (WLTP) | 152-169 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7.8 sec |
| Acceleration 0 – 62 mph | 7.8 sec |
| Acceleration 0 – 60 mph | 7.4 sec |
| Maximum speed | 237 km/h (147.26 mph) |
| Emission standard | Euro 6d-ISC-FCM |
| Weight-to-power ratio | 8.9 kg/Hp, 111.8 Hp/tonne |
| Weight-to-torque ratio | 4.6 kg/Nm, 219.2 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 | 5 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 / DTPA |
| 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 | 1825 kg (4023.44 lbs.) |
| Max. weight | 2500 kg (5511.56 lbs.) |
| Max load | 675 kg (1488.12 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 | 22 l (5.81 US gal | 4.84 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 | 100 kg (220.46 lbs.) |
| Length | 4951 mm (194.92 in.) |
| Width | 1902 mm (74.88 in.) |
| Width including mirrors | 2110 mm (83.07 in.) |
| Height | 1497-1542 mm (58.94 – 60.71 in.) |
| Wheelbase | 2925 mm (115.16 in.) |
| Front track | 1645 mm (64.76 in.) |
| Rear (Back) track | 1611 mm (63.43 in.) |
| Front overhang | 921 mm (36.26 in.) |
| Rear overhang | 1105 mm (43.5 in.) |
| Ride height (ground clearance) | 124-184 mm (4.88 – 7.24 in.) |
| Drag coefficient (Cd) | 0.29 |
| Minimum turning circle (turning diameter) | 12.2 m (40.03 ft.) |
| Drivetrain Architecture | ICE and electric motor drive front wheels, rear wheels engaged via clutch |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 7 gears, automatic transmission S tronic |
| Front suspension | Independent multi-link suspension, Air suspension |
| Rear suspension | Independent multi-link suspension, Air suspension |
| Front brakes | Ventilated discs, 338 mm |
| Rear brakes | Ventilated discs, 330 mm |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 235/55 R18; 235/50 R19; 245/45 R20 |
| Wheel rims size | 8J x 18; 8.5J x 19; 8.5J x 20 |
INTRODUCTION
The Audi A6 Allroad quattro (C8) 40 TDI, launched in December 2020, is a station wagon designed to bridge the gap between a traditional luxury car and a more rugged, off-road capable vehicle. Built on the MLB Evo platform (1HX0/A3), shared with other Volkswagen Group vehicles like the Porsche Cayenne and Bentley Bentayga, the C8 Allroad emphasizes practicality and all-weather performance. The “40 TDI” designation indicates the engine output, signifying a 2.0-liter turbocharged diesel engine producing 204 horsepower. This variant served as a popular entry point into the Allroad range, offering a balance of efficiency, performance, and standard features.
Powertrain & Engine Architecture
At the heart of the A6 Allroad 40 TDI lies the EA288evo 2.0-liter inline-four diesel engine, coded DTPA. This engine utilizes a sophisticated common-rail direct injection system, delivering fuel at pressures up to 2,500 bar for optimized combustion. A variable geometry turbocharger (VGT) with an intercooler enhances power output and responsiveness across the rev range. The engine also incorporates a diesel particulate filter (DPF) to meet stringent emissions regulations. The mild hybrid system, a 48-volt system, employs a belt-driven starter-generator (BSG) that provides a power boost during acceleration and enables coasting with the engine switched off, improving fuel economy. The seven-speed S tronic dual-clutch transmission offers quick and smooth gear changes, contributing to a refined driving experience. Gear ratios are tuned for a balance of acceleration and fuel efficiency, with a relatively tall final drive to maximize highway cruising economy.
Driving Characteristics
The 40 TDI powertrain delivers a respectable level of performance, achieving 0-60 mph in approximately 7.4 seconds. While not as overtly sporty as higher-output A6 variants, the 40 TDI provides ample torque (400 Nm / 295 lb-ft) for effortless overtaking and comfortable cruising. The S tronic transmission contributes to a seamless power delivery, and the quattro all-wheel-drive system provides excellent traction in all conditions. Compared to the manual transmission options available on other A6 models, the S tronic offers convenience and efficiency, though some enthusiasts may prefer the greater driver engagement of a manual gearbox. The Allroad’s air suspension provides a comfortable ride, absorbing bumps and imperfections in the road surface effectively. The steering is precise and well-weighted, offering a confident feel on both winding roads and highways.
Equipment & Trim Levels
The A6 Allroad 40 TDI typically came well-equipped as standard. Interior features included leather upholstery, power-adjustable front seats with memory function, a panoramic sunroof, and a premium sound system. The MMI touch response infotainment system, with its dual touchscreen displays, provided access to navigation, entertainment, and vehicle settings. Standard safety features included Audi pre sense basic, lane departure warning, and automatic emergency braking. Optional extras included adaptive cruise control, a head-up display, and matrix LED headlights. Trim levels varied slightly depending on the market, but generally offered packages that added features like upgraded interior trim, larger wheels, and advanced driver-assistance systems.
Chassis & Braking
The A6 Allroad 40 TDI features a sophisticated chassis designed for both comfort and handling. The front suspension utilizes a multi-link setup with air suspension, providing adjustable ride height and damping. The rear suspension also employs a multi-link design with air suspension. This allows the vehicle to adapt to varying road conditions and loads. Braking duties are handled by ventilated discs on all four wheels, providing ample stopping power. The front discs measure 338mm in diameter, while the rear discs are 330mm. Anti-lock braking system (ABS) and electronic stability control (ESC) are standard features, enhancing safety and control.
Market Reception & Comparison
The A6 Allroad 40 TDI was generally well-received by automotive critics, who praised its blend of practicality, comfort, and all-weather capability. The 2.0-liter diesel engine was considered a good compromise between performance and fuel economy, achieving between 36.2 and 40.6 US mpg. Compared to the more powerful 45 TDI and 50 TDI variants, the 40 TDI offered a more affordable entry point into the Allroad range, but with a noticeable reduction in outright performance. The 40 TDI also offered better fuel economy than the petrol-powered 45 TFSI model. Reliability reports suggest that the EA288 engine is generally robust, although regular maintenance is essential to ensure longevity.
Legacy
The Audi A6 Allroad quattro (C8) 40 TDI represents a refined and versatile wagon that continues to hold appeal in the used car market. The EA288 engine, when properly maintained, is known for its durability and fuel efficiency. The S tronic transmission, while generally reliable, may require servicing at higher mileages. The Allroad’s quattro all-wheel-drive system and air suspension contribute to its long-term usability and desirability, making it a compelling option for buyers seeking a premium wagon with all-weather capability. Its blend of luxury, practicality, and technology ensures its continued relevance in the automotive landscape.
