2020-2024 Audi A4 Avant (B9 8W facelift ) 30 TDI (136 Hp) Mild Hybrid S tronic

The Audi A4 Avant (B9 8W) 30 TDI Mild Hybrid S tronic, produced from September 2020 to 2024, represents a significant iteration within the fifth generation of Audi’s popular A4 series. This variant, a diesel-powered station wagon (estate), was positioned as a fuel-efficient and technologically advanced option within the A4 lineup, catering to buyers seeking practicality and reasonable performance. It falls within the facelifted B9 generation (8W), benefitting from updates to styling, technology, and powertrain options introduced in 2019. The “30 TDI” designation indicates a specific power output level, while “Mild Hybrid” and “S tronic” denote key features of its drivetrain.

Technical Specifications

Powertrain & Engine Architecture

The heart of the A4 Avant 30 TDI is the DEZB engine, a 2.0-liter inline-four cylinder diesel engine. This engine is part of Volkswagen Group’s modular engine family, known for its efficiency and refinement. It utilizes a turbocharger with an intercooler to boost power output, delivering 136 horsepower at 3000-4200 rpm and 320 Nm (236 lb-ft) of torque between 1500-2750 rpm. The engine employs a diesel common rail direct injection system, ensuring precise fuel delivery for optimal combustion. Crucially, this variant incorporates a 48V mild hybrid system. This system features a belt starter generator (BSG) and a small lithium-ion battery, enabling 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 gear changes. This transmission contributes to both fuel efficiency and a more engaging driving experience compared to traditional torque-converter automatics.

Driving Characteristics

The 136 hp output and S tronic transmission provide a balanced driving experience. While not overtly sporty, the A4 Avant 30 TDI offers sufficient power for everyday driving and highway cruising. Acceleration from 0-60 mph takes approximately 9.3 seconds, and the car reaches a top speed of 130.49 mph. The S tronic transmission’s quick shifts help to maximize the available power, and the mild hybrid system provides a subtle boost during acceleration. Compared to higher-output A4 variants like the 40 TDI, the 30 TDI feels less urgent, particularly during overtaking maneuvers. However, the lower power output also contributes to improved fuel economy. The gear ratios are tuned for efficiency, with taller gearing in higher gears to reduce engine speed at cruising speeds. The front-wheel-drive configuration provides good traction in most conditions, although it may lack the all-weather capability of quattro all-wheel-drive models.

Equipment & Trim Levels

The A4 Avant 30 TDI Mild Hybrid S tronic typically came well-equipped as standard. Features included Audi’s MMI infotainment system with a touchscreen display, automatic climate control, LED headlights, and a suite of driver-assistance systems such as lane departure warning and forward collision warning. Interior upholstery was typically cloth, with leather options available as upgrades. Trim levels varied by market, but generally, the 30 TDI sat in the mid-range of the A4 Avant lineup. Optional extras included a virtual cockpit digital instrument cluster, a premium sound system, and advanced driver-assistance features like adaptive cruise control and park assist. The interior design was typically understated and elegant, reflecting Audi’s commitment to quality and refinement.

Chassis & Braking

The A4 Avant 30 TDI utilizes a sophisticated chassis design. Front suspension consists of independent multi-link suspension, providing a comfortable ride and precise handling. The rear suspension also employs a multi-link setup, further enhancing ride quality and stability. Braking duties are handled by ventilated discs at the front and solid discs at the rear. Anti-lock braking system (ABS) and electronic stability control (ESC) are standard features, ensuring safe and controlled braking performance. The steering system is an electric power steering rack and pinion, providing a responsive and precise steering feel. The suspension tuning is geared towards comfort, but still offers a reasonably engaging driving experience.

Market Reception & Comparison

The A4 Avant 30 TDI Mild Hybrid S tronic was generally well-received by automotive critics. It was praised for its fuel efficiency, comfortable ride, and refined interior. Critics noted that the 136 hp engine provided adequate performance for most drivers, but some found it lacking in outright acceleration compared to more powerful A4 variants. In terms of fuel economy, the 30 TDI consistently outperformed higher-output models, achieving between 4.7 and 5.6 l/100 km (50-42 US mpg) in WLTP testing. Reliability reports suggest that the DEZB engine and S tronic transmission are generally reliable, although regular maintenance is essential. Compared to the 40 TDI, the 30 TDI offered a lower price point and better fuel economy, making it an attractive option for budget-conscious buyers. Compared to the petrol-powered A4 variants, the 30 TDI offered significantly better fuel economy and torque.

Legacy

The Audi A4 Avant 30 TDI Mild Hybrid S tronic represents a key step in Audi’s transition towards more efficient and environmentally friendly powertrains. The integration of mild hybrid technology demonstrated Audi’s commitment to reducing emissions and improving fuel economy. On the used car market, these models are generally sought after for their practicality, fuel efficiency, and relatively low running costs. The DEZB engine has proven to be a durable and reliable unit, and the S tronic transmission is generally well-regarded. However, potential buyers should ensure that the vehicle has been properly maintained, with regular oil changes and transmission servicing. The A4 Avant 30 TDI remains a compelling option for buyers seeking a versatile and efficient station wagon.