The Audi A6 Avant (C8) 35 TDI, produced from April 2019 to May 2023, represents a compelling blend of practicality, efficiency, and technology within the premium executive wagon segment. This variant, powered by a 2.0-liter turbocharged diesel engine and employing a mild hybrid system coupled with Audi’s S tronic dual-clutch transmission, occupied a key position in the A6 Avant lineup, offering a balance between performance and fuel economy. It catered to buyers seeking a refined and spacious vehicle for both daily commuting and long-distance travel. The C8 generation A6 Avant, built on the MLB Evo platform, aimed to deliver a more sophisticated driving experience and advanced features compared to its predecessor.
Technical Specifications
| Brand | Audi |
| Model | A6 |
| Generation | A6 Avant (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 | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 4.6-4.8 l/100 km (51.1 – 49 US mpg) |
| Fuel consumption (extra urban) | 3.8-4.3 l/100 km (61.9 – 54.7 US mpg) |
| Fuel consumption (combined) | 4.1-4.5 l/100 km (57.4 – 52.3 US mpg) |
| CO2 emissions | 108-118 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 9.5 sec |
| Acceleration 0 – 62 mph | 9.5 sec |
| Acceleration 0 – 60 mph | 9 sec |
| Maximum speed | 219 km/h (136.08 mph) |
| Emission standard | Euro 6d – TEMP |
| Weight-to-power ratio | 10.5 kg/Hp |
| Weight-to-torque ratio | 4.6 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 | 1710 kg (3769.9 lbs.) |
| Max. weight | 2330 kg (5136.77 lbs.) |
| Max load | 620 kg (1366.87 lbs.) |
| Trunk (boot) space – minimum | 565 l (19.95 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal | 13.86 UK gal) |
| AdBlue tank capacity | 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 without brakes | 750 kg (1653.47 lbs.) |
| Length | 4939 mm (194.45 in.) |
| Width | 1886 mm (74.25 in.) |
| Height | 1494 mm (58.82 in.) |
| Wheelbase | 2924 mm (115.12 in.) |
| Drivetrain Architecture | Front wheel drive, MHEV |
| Number of gears | 7 |
| Gearbox type | Automatic transmission S tronic |
INTRODUCTION
The Audi A6 Avant (C8) 35 TDI Mild Hybrid S tronic, launched in 2019, is a station wagon that forms part of the fourth generation (C8) of the A6 series. Positioned as an entry-level diesel option within the A6 Avant range, it offered a more accessible price point while still delivering the premium experience Audi is known for. The “35 TDI” designation indicates the engine’s power output, and the “Mild Hybrid” signifies the inclusion of a 48-volt electrical system designed to improve fuel efficiency and reduce emissions. The S tronic transmission, Audi’s name for its dual-clutch gearbox, provides quick and smooth gear changes.
Powertrain & Engine Architecture
At the heart of the A6 Avant 35 TDI lies the DEZD engine, a 2.0-liter inline-four cylinder diesel engine. This engine utilizes a turbocharger and intercooler to boost power and efficiency. The engine employs a common rail direct injection system, delivering fuel directly into the combustion chamber at extremely high pressure for optimized combustion. The valvetrain features four valves per cylinder, enhancing breathing and contributing to the engine’s power output. The mild hybrid system incorporates a belt starter generator (BSG) and a small lithium-ion battery. The BSG allows for extended start-stop operation, regenerative braking, and a slight power boost during acceleration. The seven-speed S tronic dual-clutch transmission provides rapid and seamless gear changes, contributing to both performance and fuel economy. This transmission is known for its efficiency and responsiveness compared to traditional automatic transmissions.
Driving Characteristics
The 163 horsepower and 272.9 lb.-ft. of torque produced by the 35 TDI engine provide adequate performance for everyday driving. Acceleration from 0 to 60 mph takes approximately 9 seconds, and the top speed is electronically limited to 136 mph. While not as quick as higher-powered A6 Avant variants like the 40 TDI or 50 TDI, the 35 TDI offers a comfortable and relaxed driving experience. The S tronic transmission contributes to smooth gear changes, and the mild hybrid system helps to minimize turbo lag. The gear ratios are tuned for fuel efficiency, with taller gearing in higher gears for relaxed cruising. Compared to manual transmission versions, the S tronic offers convenience and ease of use, particularly in urban traffic.
Equipment & Trim Levels
The A6 Avant 35 TDI typically came equipped with a generous level of standard features. These included Audi’s MMI touch response infotainment system with dual touchscreens, 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 panoramic sunroof, and upgraded sound systems. Trim levels varied by market, but generally offered options for enhanced interior finishes and exterior styling elements.
Chassis & Braking
The A6 Avant 35 TDI features an independent multi-link suspension system at both the front and rear axles, providing a comfortable and controlled ride. The suspension is tuned to balance ride comfort with handling precision. The braking system consists of ventilated discs at the front and solid discs at the rear. Anti-lock braking system (ABS) and electronic stability control (ESC) are standard features, enhancing safety and stability. The steering system is an electric power steering system, providing precise and responsive steering feel.
Market Reception & Comparison
The A6 Avant 35 TDI was generally well-received by automotive critics. It was praised for its fuel efficiency, comfortable ride, and refined interior. However, some reviewers noted that the engine lacked the outright performance of higher-powered variants. Compared to the 40 TDI, the 35 TDI offered lower running costs but sacrificed some performance. Against competitors like the BMW 5 Series Touring and Mercedes-Benz E-Class Estate, the A6 Avant 35 TDI offered a compelling combination of features, quality, and efficiency.
Legacy
The 2.0-liter TDI engine with the S tronic transmission has proven to be a reliable powertrain in various Audi models. While diesel engines have faced increased scrutiny in recent years, the DEZD engine is known for its durability and relatively low maintenance costs. In the used car market, the A6 Avant 35 TDI represents a good value proposition for buyers seeking a spacious, comfortable, and fuel-efficient executive wagon. Regular maintenance, including oil changes and adherence to recommended service intervals, is crucial for ensuring the long-term reliability of this powertrain.
