The Audi A6 Sedan (C8) 35 TDI, produced from April 2019 to May 2023, represents a key entry point into the fourth generation (C8) A6 lineup. Positioned as a fuel-efficient and technologically advanced option, this variant combined a 2.0-liter turbocharged diesel engine with a mild hybrid system and Audi’s seven-speed S tronic dual-clutch transmission. It was primarily marketed in Europe and other regions where diesel engines remain popular, offering a balance between performance, economy, and refinement. The 35 TDI trim aimed at buyers seeking a comfortable and sophisticated executive sedan without the higher price tag of more powerful engine options.
Technical Specifications
| Brand | Audi |
| Model | A6 |
| Generation | A6 Sedan (C8) |
| Type (Engine) | 35 TDI (163 Hp) Mild Hybrid S tronic |
| Start of production | April, 2019 |
| End of production | May, 2023 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 4.5-4.7 l/100 km (52.3 – 50 US mpg) |
| Fuel consumption (extra urban) | 3.7-4.0 l/100 km (63.6 – 58.8 US mpg) |
| Fuel consumption (combined) | 4.0-4.3 l/100 km (58.8 – 54.7 US mpg) |
| CO2 emissions | 104-112 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 9.3 sec |
| Acceleration 0 – 62 mph | 9.3 sec |
| Acceleration 0 – 60 mph | 8.8 sec |
| Maximum speed | 224 km/h (139.19 mph) |
| Emission standard | Euro 6d – TEMP |
| Weight-to-power ratio | 10.1 kg/Hp |
| Weight-to-torque ratio | 4.4 kg/Nm |
| Power | 163 Hp @ 3250-4200 rpm |
| Torque | 370 Nm @ 1500-3000 rpm (272.9 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | DEZD |
| 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 | 16:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 5.5 l (5.81 US qt | 4.84 UK qt) |
| Coolant capacity | 12.6 l (13.31 US qt | 11.09 UK qt) |
| Kerb Weight | 1645 kg (3626.6 lbs.) |
| Max. weight | 2255 kg (4971.42 lbs.) |
| Max load | 610 kg (1344.82 lbs.) |
| Trunk (boot) space – minimum | 530 l (18.72 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 | 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.) |
| Height | 1457 mm (57.36 in.) |
| Wheelbase | 2924 mm (115.12 in.) |
| Drivetrain Architecture | Front wheel drive, MHEV |
| Number of gears and type of gearbox | 7 gears, automatic transmission S tronic |
Powertrain & Engine Architecture
The heart of the A6 35 TDI is the DEZD engine, a 2.0-liter inline-four cylinder diesel. This engine utilizes a turbocharger with an intercooler to boost power and efficiency. It features a common rail direct injection system, delivering fuel directly into the combustion chamber at extremely high pressure for optimized combustion. The engine produces 163 horsepower at 3250-4200 rpm and 370 Nm (272.9 lb-ft) of torque between 1500-3000 rpm. The 16:1 compression ratio is typical for modern diesel engines, contributing to thermal efficiency.
Crucially, the 35 TDI incorporates a 48-volt mild hybrid system. This system uses a belt starter generator (BSG) and a small lithium-ion battery to enable features like extended start-stop operation, coasting with the engine switched off, and a slight power boost during acceleration. While not capable of fully electric driving, the mild hybrid system contributes to improved fuel economy and reduced emissions. 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.
Driving Characteristics
The A6 35 TDI Automatic delivers a comfortable and refined driving experience. While not a performance-oriented variant, the 370 Nm of torque provides ample power for everyday driving and overtaking maneuvers. Acceleration from 0 to 100 km/h (0-62 mph) takes approximately 9.3 seconds. The S tronic transmission contributes to seamless gear changes, enhancing the overall driving experience. Compared to the more powerful 40 TDI or 50 TDI models, the 35 TDI feels less urgent in its acceleration, but it offers a more relaxed and fuel-efficient driving style. The gear ratios are tuned for efficiency, prioritizing fuel economy over outright performance. The mild hybrid system is largely transparent to the driver, providing subtle assistance during acceleration and contributing to a smoother start-stop experience.
Equipment & Trim Levels
The A6 35 TDI typically came equipped with a generous amount of standard features. These included Audi’s MMI touch response infotainment system with a dual touchscreen display, Audi Virtual Cockpit (digital instrument cluster), 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 included features like adaptive cruise control, a head-up display, a premium sound system, and matrix LED headlights. Trim levels varied by market, but generally offered options for upgraded interior materials, exterior styling enhancements, and additional driver-assistance features.
Chassis & Braking
The A6 35 TDI utilizes an independent multi-link suspension setup for both the front and rear axles, providing a comfortable ride and good handling characteristics. The suspension is tuned to balance comfort and control, making it well-suited for long-distance driving. Front brakes are ventilated discs, while rear brakes are solid discs. The car is equipped with ABS (Anti-lock braking system), electronic stability control, and traction control. The steering system is an electric power steering rack and pinion, offering precise and responsive steering feel.
Market Reception & Comparison
The A6 35 TDI was generally well-received by automotive critics as a practical and efficient executive sedan. It was praised for its comfortable ride, refined interior, and advanced technology. Fuel economy was a major selling point, with combined fuel consumption figures ranging from 4.0 to 4.3 l/100 km (58.8 – 54.7 US mpg). Compared to the higher-output TDI variants, the 35 TDI offered a more affordable entry point into the A6 range, but at the expense of some performance. The 40 TDI, with its more powerful engine, was often seen as a better choice for drivers who prioritized performance, while the 35 TDI appealed to those who valued fuel efficiency and comfort.
Legacy
The DEZD engine, in its various iterations, has proven to be a reliable and durable powertrain. While diesel engines have faced increasing scrutiny in recent years, the A6 35 TDI remains a popular choice in the used car market, particularly for buyers seeking a fuel-efficient and comfortable long-distance cruiser. The mild hybrid system adds a layer of modernity and contributes to improved fuel economy. Regular maintenance, including timely oil changes and adherence to recommended service intervals, is crucial for ensuring the long-term reliability of this powertrain. The S tronic transmission, while generally reliable, may require servicing at higher mileages to ensure smooth operation.
