The Audi A4 (B9 8W) 2.0 TDI ultra, produced from 2015 to 2018, represented a key variant within the fifth generation of Audi’s popular executive sedan. Positioned as a fuel-efficient option within the B9 A4 lineup, it aimed to balance performance with economy, appealing to drivers prioritizing lower running costs. This model utilized a 2.0-liter turbocharged diesel engine paired with Audi’s seven-speed S tronic dual-clutch transmission, and was primarily marketed in Europe and other regions where diesel fuel was prevalent. The “ultra” designation signified Audi’s efforts to reduce weight and optimize aerodynamics for improved fuel efficiency.
Technical Specifications
| Brand | Audi |
| Model | A4 |
| Generation | A4 (B9 8W) |
| Type (Engine) | 2.0 TDI ultra (150 Hp) S tronic |
| Start of production | 2015 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 4.6-4.7 l/100 km (51.1 – 50 US mpg, 61.4 – 60.1 UK mpg, 21.7 – 21.3 km/l) |
| Fuel consumption (extra urban) | 3.4-3.5 l/100 km (69.2 – 67.2 US mpg, 83.1 – 80.7 UK mpg, 29.4 – 28.6 km/l) |
| Fuel consumption (combined) | 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) |
| CO2 emissions | 99-101 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 8.7 sec |
| Acceleration 0 – 62 mph | 8.7 sec |
| Acceleration 0 – 60 mph | 8.3 sec |
| Maximum speed | 210 km/h (130.49 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 9.8 kg/Hp, 102 Hp/tonne |
| Weight-to-torque ratio | 4.6 kg/Nm, 217.7 Nm/tonne |
| Power | 150 Hp @ 3250-4200 rpm |
| Power per litre | 76.2 Hp/l |
| Torque | 320 Nm @ 1500-3250 rpm (236.02 lb.-ft. @ 1500-3250 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | DEUA |
| 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 | 16.2:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 4.7 l (4.97 US qt | 4.14 UK qt) |
| Kerb Weight | 1470 kg (3240.8 lbs.) |
| Max. weight | 2070 kg (4563.57 lbs.) |
| Max load | 600 kg (1322.77 lbs.) |
| Trunk (boot) space – minimum | 480 l (16.95 cu. ft.) |
| Trunk (boot) space – maximum | 965 l (34.08 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%) | 1600 kg (3527.4 lbs.) |
| Permitted trailer load with brakes (12%) | 1400 kg (3086.47 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Permitted towbar download | 80 kg (176.37 lbs.) |
| Length | 4726 mm (186.06 in.) |
| Width | 1842 mm (72.52 in.) |
| Width including mirrors | 2022 mm (79.61 in.) |
| Height | 1427 mm (56.18 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 | 1026 mm (40.39 in.) |
| Drag coefficient (Cd) | 0.23 |
| Minimum turning circle (turning diameter) | 11.6 m (38.06 ft.) |
| 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 | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 205/60 R16; 225/50 R17 |
| Wheel rims size | 7J x 16; 17 |
Powertrain & Engine Architecture
The heart of the A4 2.0 TDI ultra is the DEUA engine, a 2.0-liter inline-four cylinder diesel engine. This engine is part of the Volkswagen Group’s modular engine family, known for its compact design and efficiency. It features a common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. The engine utilizes a single turbocharger with an intercooler to boost power and torque. The valvetrain employs a dual overhead camshaft (DOHC) configuration with four valves per cylinder, enhancing breathing and overall performance. The S tronic seven-speed dual-clutch transmission provides rapid and smooth gear changes, contributing to both performance and fuel economy. This transmission allows for both fully automatic operation and manual gear selection via steering wheel-mounted paddles or the gear selector.
Driving Characteristics
The 150 horsepower and 320 Nm (236 lb-ft) of torque offered by the 2.0 TDI ultra provided adequate performance for everyday driving. Acceleration from 0 to 62 mph (0-100 km/h) took approximately 8.7 seconds, and top speed was limited to 130.49 mph (210 km/h). Compared to higher-output A4 variants, such as those with the 190 hp TDI engine, the 150 hp version felt less eager to accelerate, particularly at higher speeds. However, the S tronic transmission helped to mitigate this by providing quick downshifts for overtaking. The gear ratios were tuned for fuel efficiency, resulting in a slightly more relaxed driving experience. The engine delivered strong low-end torque, making it well-suited for city driving and highway cruising.
Equipment & Trim Levels
The A4 2.0 TDI ultra typically came equipped with a respectable level of standard features. These included Audi’s Multi Media Interface (MMI) infotainment system with a central display screen, automatic climate control, power windows and mirrors, and alloy wheels. Interior upholstery was generally cloth, with leather options available as an upgrade. Common optional extras included a sunroof, navigation system, parking sensors, and advanced driver-assistance systems like adaptive cruise control and lane departure warning. Trim levels varied by market, but generally offered packages that added features like upgraded interior trim, premium sound systems, and exterior styling enhancements.
Chassis & Braking
The B9 A4 featured a sophisticated chassis design with independent multi-link suspension at both the front and rear. This setup provided a comfortable ride quality while maintaining good handling characteristics. The 2.0 TDI ultra variant typically used ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock Braking System (ABS) was standard, along with Electronic Stability Control (ESC). The suspension was tuned to balance comfort and handling, with stabilizer bars helping to reduce body roll during cornering. The weight distribution was well-balanced, contributing to the car’s predictable handling.
Market Reception & Comparison
The Audi A4 2.0 TDI ultra was generally well-received by automotive critics for its fuel efficiency and comfortable ride. However, some reviewers noted that the 150 hp engine could feel underpowered, especially when fully loaded or driving uphill. Compared to the more powerful TDI variants, the ultra model offered a lower price point and significantly better fuel economy. Against competitors like the BMW 320d and Mercedes-Benz C220d, the A4 2.0 TDI ultra held its own in terms of refinement and technology, but often lagged slightly in outright performance. Its fuel economy figures were consistently among the best in its class.
Legacy
The 2.0 TDI ultra powertrain has proven to be relatively reliable, although, like all modern diesel engines, it is susceptible to issues with the diesel particulate filter (DPF) if not driven on longer journeys regularly. The S tronic transmission is generally durable, but requires regular servicing to ensure smooth operation. In the used car market, the A4 2.0 TDI ultra represents a good value proposition for buyers seeking a fuel-efficient and comfortable executive sedan. Its combination of practicality, refinement, and economy continues to make it a popular choice, and well-maintained examples can provide many years of reliable service.
