2020-2024 Audi A4 (B9 8W facelift ) 35 TDI (163 Hp) Mild Hybrid S tronic

The Audi A4 B9 8W, specifically the 35 TDI (163 hp) Mild Hybrid S tronic variant, represents a significant iteration of Audi’s popular executive sedan. Introduced with the facelift in late 2019 for the 2020 model year and continuing through 2024, this version occupied a crucial position in the A4 lineup, offering a balance of fuel efficiency, reasonable performance, and technological sophistication. It was primarily marketed in Europe and other regions where diesel engines remained popular, serving as a practical and refined choice for daily commuting and longer journeys. This model is built on the Volkswagen Group’s MLB Evo platform, shared with other Audi, Volkswagen, and Škoda models.

Technical Specifications

Powertrain & Engine Architecture

The heart of the A4 35 TDI is the Volkswagen Group’s 2.0-liter inline-four cylinder diesel engine, designated the DEZE code. This engine utilizes a common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. A turbocharger with an intercooler is employed to boost power and torque, providing 163 horsepower at 3250-4200 rpm and a substantial 370 Nm (272.9 lb-ft) of torque between 1500 and 3000 rpm. The engine features a 16:1 compression ratio and four valves per cylinder. Crucially, this variant incorporates a 48V mild hybrid system. This system utilizes a belt starter generator (BSG) and a small lithium-ion battery to enable features like extended start-stop operation, coasting with engine off, and a slight power boost during acceleration. The transmission is a seven-speed S tronic dual-clutch automatic, known for its quick and smooth shifts. This transmission is a key component in maximizing fuel efficiency and providing a responsive driving experience.

Driving Characteristics

The 163 hp diesel engine paired with the S tronic transmission delivers a comfortable and efficient driving experience. Acceleration from 0 to 100 km/h (0-62 mph) takes approximately 8.2 seconds, which is adequate for everyday driving but doesn’t offer particularly sporty performance. The engine’s strong low-end torque makes it well-suited for overtaking maneuvers and provides effortless cruising on highways. Compared to the more powerful 40 TDI variants, the 35 TDI feels less urgent, but the S tronic transmission helps to keep the engine in its optimal power band. The mild hybrid system contributes to a smoother start-stop experience and marginally improves fuel economy. The gear ratios are tuned for efficiency, prioritizing fuel savings over outright performance.

Equipment & Trim Levels

The A4 35 TDI typically came equipped with a generous amount of standard features. These included Audi’s MMI infotainment system with a 7-inch touchscreen display (larger screens were optional), automatic climate control, a leather-wrapped steering wheel, and cloth upholstery. Safety features such as ABS, electronic stability control, and multiple airbags were standard. Optional extras included leather seats, a sunroof, a premium sound system, and advanced driver-assistance systems like adaptive cruise control and lane-keeping assist. Trim levels varied by market, but generally, the 35 TDI was positioned as a mid-range offering, bridging the gap between the entry-level models and the more luxurious, higher-powered trims.

Chassis & Braking

The A4 B9 utilizes a sophisticated chassis design featuring independent multi-link suspension at both the front and rear. This setup provides a comfortable ride quality and good handling characteristics. The 35 TDI variant, due to its lower power output and weight compared to higher-spec models, often featured slightly smaller brakes – typically ventilated discs at the front and solid discs at the rear. The steering is a speed-sensitive electric power steering system, offering a balance of assistance and feedback. Stabilizer bars are fitted front and rear to reduce body roll during cornering.

Market Reception & Comparison

The A4 35 TDI was generally well-received by automotive critics as a practical and efficient option. It was praised for its comfortable ride, refined interior, and fuel economy. However, some reviewers noted that the performance was not as exhilarating as that of the more powerful A4 variants. Compared to the 40 TDI, the 35 TDI offered lower running costs but sacrificed some performance. Against competitors like the BMW 320d and Mercedes-Benz C200d, the A4 35 TDI held its own in terms of refinement and technology, often offering a more user-friendly infotainment system. Fuel economy figures of 4.6-5.4 l/100 km (51.1 – 43.6 US mpg) were competitive within its class.

Legacy

The DEZE 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 A4 35 TDI remains a popular choice in the used car market, particularly for those seeking a fuel-efficient and comfortable long-distance cruiser. The mild hybrid technology adds a layer of modernity and contributes to improved fuel economy. Proper maintenance, including regular oil changes and adherence to recommended service intervals, is crucial for ensuring the longevity of this powertrain. The S tronic transmission, while generally reliable, may require servicing at higher mileages to prevent potential issues.