The Audi A4 (B9 8W) 3.0 TDI V6 with the S tronic dual-clutch transmission represents a compelling blend of performance and efficiency within the fifth generation of Audi’s popular executive sedan. Produced from 2015 to 2018, this variant occupied a premium position in the A4 lineup, offering a significant step up in power and refinement compared to the base 1.4 and 2.0-liter four-cylinder models. It served as a strong alternative to competitors like the BMW 330d and Mercedes-Benz C300d, particularly in European markets where diesel engines remained highly favored. This model was never officially sold in the North American market, where Audi focused on gasoline-powered A4 variants.
Technical Specifications
| Brand | Audi |
| Model | A4 |
| Generation | A4 (B9 8W) |
| Type (Engine) | 3.0 TDI V6 (218 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) | 4.9 – 4.8 l/100 km (48 – 49 US mpg, 57.6 – 58.9 UK mpg, 20.4 – 20.8 km/l) |
| Fuel consumption (extra urban) | 4.3 – 4.0 l/100 km (54.7 – 58.8 US mpg, 65.7 – 70.6 UK mpg, 23.3 – 25 km/l) |
| Fuel consumption (combined) | 4.5 – 4.2 l/100 km (52.3 – 56 US mpg, 62.8 – 67.3 UK mpg, 22.2 – 23.8 km/l) |
| CO2 emissions | 117 – 109 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.6 sec |
| Acceleration 0 – 62 mph | 6.6 sec |
| Acceleration 0 – 60 mph | 6.3 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 7.1 kg/Hp, 141.6 Hp/tonne |
| Weight-to-torque ratio | 3.9 kg/Nm, 259.7 Nm/tonne |
| Power | 218 Hp @ 4000-5000 rpm |
| Torque | 400 Nm @ 1250-3750 rpm (295.02 lb.-ft. @ 1250-3750 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | CSWB |
| Engine displacement | 2967 cm3 (181.06 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 91.4 mm (3.6 in.) |
| Compression ratio | 16:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 6.1 l (6.45 US qt | 5.37 UK qt) |
| Kerb Weight | 1540 kg (3395.12 lbs.) |
| Max. weight | 2110 kg (4651.75 lbs.) |
| Max load | 570 kg (1256.63 lbs.) |
| Trunk (boot) space – minimum | 480 l (16.95 cu. ft.) |
| Trunk (boot) space – maximum | 965 l (34.08 cu. ft.) |
| Fuel tank capacity | 54 l (14.27 US gal | 11.88 UK gal) |
| Max. roof load | 90 kg (198.42 lbs.) |
| Permitted trailer load with brakes (8%) | 1900 kg (4188.78 lbs.) |
| Permitted trailer load with brakes (12%) | 1700 kg (3747.86 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) | 0.27 |
| 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 | 225/50 R17 |
| Wheel rims size | 7.5J x 17 |
INTRODUCTION
The Audi A4 (B9) 3.0 TDI V6 S tronic, launched in 2015, represented a significant offering within the fifth generation A4 range (internally designated the B9 8W). Positioned as a premium trim level, it catered to drivers seeking a balance of performance, luxury, and fuel efficiency. Built on the Volkswagen Group’s MLB Evo platform, the B9 A4 brought advancements in lightweight construction, aerodynamics, and infotainment technology. This particular variant, with its potent diesel engine and quick-shifting dual-clutch transmission, was primarily aimed at the European market, where diesel remained the dominant fuel choice for executive cars. It offered a compelling alternative to petrol-powered A4 models and rival vehicles from BMW and Mercedes-Benz.
Powertrain & Engine Architecture
At the heart of the A4 3.0 TDI lies the CSWB engine, a 3.0-liter V6 turbodiesel. This engine is part of Audi’s modular engine family and features a cast iron block with aluminum cylinder heads. The engine utilizes a common rail direct injection system, delivering fuel at pressures up to 2,500 bar for optimized combustion. It employs four valves per cylinder and a single turbocharger with an intercooler to boost power and torque. The engine’s variable geometry turbocharger (VGT) helps to deliver strong low-end torque while maintaining high power output at higher RPMs. The S tronic 7-speed dual-clutch transmission is a key component of this variant. This transmission offers incredibly fast and smooth gear changes, contributing to both performance and efficiency. Unlike a traditional automatic, the S tronic uses two separate clutches – one for even gears and one for odd gears – allowing for pre-selection of the next gear. This minimizes interruption in power delivery during shifts.
Driving Characteristics
The 218 horsepower and 400 Nm (295 lb-ft) of torque produced by the 3.0 TDI engine provide brisk acceleration. The 0-60 mph sprint takes approximately 6.3 seconds, and the car feels responsive in everyday driving situations. The S tronic transmission plays a crucial role in maximizing the engine’s potential, delivering seamless gear changes and keeping the engine in its optimal power band. Compared to the 1.4 and 2.0-liter A4 variants, the 3.0 TDI offers significantly more effortless performance, particularly when fully loaded or tackling inclines. While a six-speed manual transmission was available on some A4 models, the S tronic was the preferred choice for this high-output diesel, offering a more refined and convenient driving experience. The gear ratios are tuned for a balance of acceleration and fuel economy, with a relatively tall seventh gear for efficient cruising on the highway.
Equipment & Trim Levels
The A4 3.0 TDI V6 S tronic typically came well-equipped, reflecting its premium positioning. Standard features often included Audi’s MMI infotainment system with a 7-inch display (larger screens were optional), three-zone automatic climate control, leather upholstery, and front sport seats. Exterior features included 17-inch alloy wheels, LED headlights, and chrome trim accents. Optional extras included Audi’s Virtual Cockpit (a fully digital instrument cluster), a Bang & Olufsen sound system, adaptive cruise control, and a panoramic sunroof. Trim levels varied slightly depending on the market, but generally, this variant was positioned above the 2.0 TDI and 2.0 TFSI models in terms of standard equipment and available options.
Chassis & Braking
The B9 A4 features a sophisticated chassis design with a multi-link suspension at both the front and rear axles. This setup provides a comfortable ride while maintaining good handling characteristics. The 3.0 TDI variant, due to its higher weight, often featured slightly stiffer springs and dampers compared to the lower-powered models. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power. ABS (Anti-lock Braking System) and electronic stability control are standard safety features. The steering system is an electromechanical power steering system, offering precise and responsive steering feel.
Market Reception & Comparison
The Audi A4 3.0 TDI V6 S tronic was generally well-received by automotive critics. Reviewers praised its powerful and refined engine, smooth-shifting transmission, and comfortable ride. Fuel economy was also a strong point, with combined fuel consumption figures averaging around 52-56 mpg (US). Compared to the 2.0 TDI, the 3.0 TDI offered a noticeable performance advantage, but at a higher price point. The 2.0 TDI was often seen as the more sensible choice for drivers prioritizing fuel efficiency and affordability. The 2.0 TFSI petrol engine offered similar performance to the 3.0 TDI but lacked the diesel’s low-end torque and fuel economy. Reliability was generally good, although some owners reported issues with the diesel particulate filter (DPF) and turbocharger.
Legacy
The Audi A4 (B9) 3.0 TDI V6 S tronic remains a desirable used car option, particularly for those seeking a refined and efficient executive sedan. The 3.0 TDI engine is known for its durability, although regular maintenance is crucial, especially regarding the DPF and turbocharger. The S tronic transmission is generally reliable, but it’s important to ensure that it has been serviced according to Audi’s recommendations. As with any diesel vehicle, it’s important to be aware of potential issues related to emissions regulations and potential restrictions in certain urban areas. Today, these models represent a sweet spot of performance, luxury, and value in the used car market, offering a compelling alternative to newer, more technologically advanced vehicles.
