The Audi A4 (B9 8W) 30 TDI S tronic, produced from 2018 to 2019, represents a key variant within the facelifted B9 generation of Audi’s popular compact executive car. Positioned as an entry-level diesel offering in many European markets, this model aimed to balance fuel efficiency with acceptable performance for daily commuting and longer journeys. It slots into the A4 lineup below more powerful TDI variants like the 40 TDI and petrol options such as the 45 TFSI. The “30 TDI” designation reflects Audi’s power-based naming scheme, indicating a power output of approximately 122 horsepower. This version primarily served the European market, where diesel engines remained highly popular due to favorable taxation and fuel economy.
Technical Specifications
| Brand | Audi |
| Model | A4 |
| Generation | A4 (B9 8W, facelift 2018) |
| Type (Engine) | 30 TDI (122 Hp) S tronic |
| Start of production | 2018 |
| End of production | 2019 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 4.9-5.0 l/100 km (48 – 47 US mpg, 57.6 – 56.5 UK mpg, 20.4 – 20 km/l) |
| Fuel consumption (extra urban) | 3.8-3.9 l/100 km (61.9 – 60.3 US mpg, 74.3 – 72.4 UK mpg, 26.3 – 25.6 km/l) |
| Fuel consumption (combined) | 4.2-4.3 l/100 km (56 – 54.7 US mpg, 67.3 – 65.7 UK mpg, 23.8 – 23.3 km/l) |
| CO2 emissions | 110-114 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 10.6 sec |
| Acceleration 0 – 62 mph | 10.6 sec |
| Acceleration 0 – 60 mph | 10.1 sec |
| Maximum speed | 204 km/h (126.76 mph) |
| Emission standard | Euro 6d – TEMP |
| Weight-to-power ratio | 12 kg/Hp, 83.3 Hp/tonne |
| Weight-to-torque ratio | 5.4 kg/Nm, 184.3 Nm/tonne |
| Power | 122 Hp @ 3500-4000 rpm |
| Power per litre | 62 Hp/l |
| Torque | 270 Nm @ 1500-3000 rpm (199.14 lb.-ft. @ 1500-3000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | DEUC |
| Engine displacement | 1968 cm3 (120.09 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 4.7 l (4.97 US qt | 4.14 UK qt) |
| Kerb Weight | 1465 kg (3229.77 lbs.) |
| Max. weight | 2080 kg (4585.62 lbs.) |
| Max load | 615 kg (1355.84 lbs.) |
| Trunk (boot) space – minimum | 480 l (16.95 cu. ft.) |
| Fuel tank capacity | 40 l (10.57 US gal | 8.8 UK gal) |
| Max. roof load | 90 kg (198.42 lbs.) |
| Permitted trailer load with brakes (8%) | 1700 kg (3747.86 lbs.) |
| Permitted trailer load with brakes (12%) | 1500 kg (3306.93 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 80 kg (176.37 lbs.) |
| Length | 4738 mm (186.54 in.) |
| Width | 1842 mm (72.52 in.) |
| Width including mirrors | 2022 mm (79.61 in.) |
| Height | 1428 mm (56.22 in.) |
| Wheelbase | 2820 mm (111.02 in.) |
| Front track | 1572 mm (61.89 in.) |
| Rear (Back) track | 1555 mm (61.22 in.) |
| Front overhang | 880 mm (34.65 in.) |
| Rear overhang | 1038 mm (40.87 in.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the front wheels of the vehicle. |
| Drive wheel | Front wheel drive |
| Number of gears and type of gearbox | 7 gears, automatic transmission S tronic |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 205/60 R16 |
| Wheel rims size | 7J x 16 |
Powertrain & Engine Architecture
The heart of the A4 30 TDI S tronic is the 2.0-liter four-cylinder diesel engine, specifically the DEUC engine code. This engine is a member of the Volkswagen Group’s modular engine family, known for its compact dimensions and efficiency. It utilizes a common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. The engine is turbocharged with a single turbocharger and intercooled to enhance power and torque. The valvetrain features four valves per cylinder, contributing to improved breathing and overall performance. The S tronic transmission is a seven-speed dual-clutch transmission (DCT). This transmission offers quick and smooth gear changes, enhancing both performance and fuel efficiency. It operates by pre-selecting the next gear, allowing for near-instantaneous shifts.
Driving Characteristics
The 122 horsepower and 270 Nm (199 lb-ft) of torque delivered by the 30 TDI engine provide adequate performance for everyday driving. Acceleration from 0 to 62 mph takes approximately 10.6 seconds, and the top speed is 126.76 mph. While not particularly sporty, the engine offers a broad torque band, making it responsive in most driving situations. The S tronic transmission contributes to a refined driving experience, with smooth and quick gear changes. Compared to the more powerful 40 TDI variant, the 30 TDI feels less urgent in acceleration, but it offers significantly better fuel economy. The gear ratios in the S tronic are tuned for efficiency, prioritizing fuel savings over outright performance.
Equipment & Trim Levels
The A4 30 TDI S tronic typically came equipped with a respectable level of standard features. These included Audi’s MMI infotainment system with a 7-inch display, automatic climate control, and a leather-wrapped multifunction steering wheel. Safety features such as ABS, electronic stability control, and multiple airbags were standard. Optional extras included larger alloy wheels, a panoramic sunroof, upgraded upholstery, and advanced driver-assistance systems like adaptive cruise control and lane departure warning. Trim levels varied by market, but generally, the 30 TDI S tronic served as the entry point to the A4 range, with higher trims offering more luxurious appointments and additional features.
Chassis & Braking
The A4 B9 features a sophisticated chassis design with independent multi-link suspension at both the front and rear axles. This setup provides a comfortable ride and good handling characteristics. The front suspension utilizes aluminum components to reduce weight, while the rear suspension is optimized for stability and control. The braking system consists of ventilated discs at the front and solid discs at the rear. ABS (Anti-lock Braking System) is standard, ensuring safe and controlled braking in various conditions. The steering is an electromechanical power steering system, providing precise and responsive steering feel.
Market Reception & Comparison
The Audi A4 30 TDI S tronic was generally well-received by automotive critics as a practical and efficient option within the executive car segment. Its fuel economy was a major selling point, particularly in Europe. However, some reviewers noted that the engine lacked the outright performance of more powerful alternatives. Compared to the 40 TDI, the 30 TDI offered lower running costs but compromised on acceleration and overall driving excitement. Against competitors like the BMW 320d and Mercedes-Benz C200d, the A4 30 TDI held its own in terms of refinement, technology, and fuel efficiency.
Legacy
The 2.0-liter TDI engine and S tronic transmission combination used in the A4 30 TDI have proven to be relatively reliable over the long term, provided they are properly maintained. Regular oil changes and adherence to the manufacturer’s service schedule are crucial. Common issues can include diesel particulate filter (DPF) clogging, particularly with frequent short journeys, and potential wear and tear on the dual-clutch transmission. In the used car market, the A4 30 TDI S tronic represents a good value proposition for buyers seeking a comfortable, efficient, and well-equipped executive car. Its lower price point compared to more powerful variants makes it an attractive option for those prioritizing fuel economy and practicality.
