The Audi A4 (B8 8K) 2.0 TDI quattro, produced from 2009 to 2011, represented a significant iteration of Audi’s popular executive sedan. Positioned as a mid-range offering within the B8 A4 lineup, this variant combined a fuel-efficient turbocharged diesel engine with Audi’s renowned quattro all-wheel-drive system. It aimed to deliver a balance of performance, practicality, and all-weather capability, appealing to buyers seeking a refined and capable daily driver. The B8 generation, built on the Volkswagen Group’s B8 platform (shared with models like the VW Passat and Skoda Superb), brought advancements in technology, interior quality, and driving dynamics compared to its predecessor.
Technical Specifications
| Brand | Audi |
| Model | A4 |
| Generation | A4 (B8 8K) |
| Type (Engine) | 2.0 TDI (170 Hp) quattro |
| Start of production | 2009 |
| End of production | 2011 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 7.1 l/100 km (33.1 US mpg, 39.8 UK mpg, 14.1 km/l) |
| Fuel consumption (extra urban) | 4.9 l/100 km (48 US mpg, 57.6 UK mpg, 20.4 km/l) |
| Fuel consumption (combined) | 5.7 l/100 km (41.3 US mpg, 49.6 UK mpg, 17.5 km/l) |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 8.6 sec |
| Acceleration 0 – 62 mph | 8.6 sec |
| Acceleration 0 – 60 mph | 8.2 sec |
| Maximum speed | 220 km/h (136.7 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 9.2 kg/Hp, 109 Hp/tonne |
| Weight-to-torque ratio | 4.5 kg/Nm, 224.4 Nm/tonne |
| Power | 170 Hp @ 4200 rpm |
| Power per litre | 86.4 Hp/l |
| Torque | 350 Nm @ 1750-2500 rpm (258.15 lb.-ft. @ 1750-2500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | EA189 / CAHA |
| 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 | 16.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 5 l (5.28 US qt | 4.4 UK qt) |
| Kerb Weight | 1560 kg (3439.21 lbs.) |
| Max. weight | 2110 kg (4651.75 lbs.) |
| Max load | 550 kg (1212.54 lbs.) |
| Trunk (boot) space – minimum | 480 l (16.95 cu. ft.) |
| Trunk (boot) space – maximum | 962 l (33.97 cu. ft.) |
| Fuel tank capacity | 64 l (16.91 US gal | 14.08 UK gal) |
| Length | 4703 mm (185.16 in.) |
| Width | 1826 mm (71.89 in.) |
| Height | 1427 mm (56.18 in.) |
| Wheelbase | 2808 mm (110.55 in.) |
| Front track | 1564 mm (61.57 in.) |
| Rear (Back) track | 1551 mm (61.06 in.) |
| Drag coefficient (Cd) | 0.29 |
| Minimum turning circle | 11.5 m (37.73 ft.) |
| Drivetrain Architecture | All wheel drive (4×4) |
| Number of gears | 6 gears, manual transmission |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| 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 | 225/55 R16 |
| Wheel rims size | 7.5J x 16 |
Powertrain & Engine Architecture
The heart of the A4 2.0 TDI quattro is the EA189 series 2.0-liter inline-four diesel engine, specifically the CAHA code. This engine utilizes a common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. The turbocharger, coupled with an intercooler, provides increased air density for improved power output. The engine features a double overhead camshaft (DOHC) valvetrain with four valves per cylinder, enhancing breathing and efficiency. The 16.5:1 compression ratio is typical for a diesel engine, contributing to its thermal efficiency. The engine’s longitudinal mounting allowed for a more balanced weight distribution, crucial for the quattro system’s effectiveness. The six-speed manual transmission was the standard offering, providing precise gear changes and a direct connection to the engine.
Driving Characteristics
The 170 horsepower and 350 Nm (258 lb-ft) of torque offered a respectable level of performance for everyday driving. Acceleration from 0-60 mph took approximately 8.2 seconds, and the car felt responsive in most situations. While not as quick as the higher-output 2.0 TDI variants or the A4’s petrol engines, the 2.0 TDI quattro provided ample power for highway cruising and overtaking. The manual transmission’s gear ratios were well-matched to the engine’s torque curve, ensuring strong pull throughout the rev range. The quattro all-wheel-drive system provided excellent traction in all weather conditions, enhancing stability and confidence. Compared to front-wheel-drive A4 models, the quattro version offered noticeably improved handling and cornering grip.
Equipment & Trim Levels
The 2.0 TDI quattro typically came equipped with a solid base level of features. Standard equipment included air conditioning, power windows, power mirrors, a multi-function steering wheel, and an Audi Concert audio system. Interior upholstery was typically cloth, though leather options were available. Higher trim levels, such as the S-line, added sportier styling cues, including unique bumpers, side skirts, and interior trim. Optional extras included a sunroof, navigation system, parking sensors, and upgraded audio systems. The A4’s interior was known for its high-quality materials and build quality, creating a refined and comfortable cabin environment.
Chassis & Braking
The B8 A4 featured a sophisticated chassis design. The front suspension utilized an independent multi-link setup, providing excellent ride comfort and handling precision. The rear suspension also employed an independent multi-link design, further enhancing ride quality and stability. The quattro system distributed power between the front and rear axles as needed, optimizing traction and handling. Braking duties were handled by ventilated discs at the front and solid discs at the rear, providing adequate stopping power. Anti-lock braking system (ABS) was standard, enhancing safety and control during emergency braking situations.
Market Reception & Comparison
The Audi A4 2.0 TDI quattro was generally well-received by automotive critics. It was praised for its fuel efficiency, refined driving experience, and all-weather capability. Compared to the 1.8 TFSI models, the 2.0 TDI offered better fuel economy and more low-end torque, making it a more practical choice for drivers who frequently cover long distances. However, the petrol engines provided a more responsive and engaging driving experience. The 2.0 TDI quattro also offered a compelling alternative to rivals such as the BMW 320d xDrive and the Mercedes-Benz C220 CDI, often being lauded for its superior interior quality and technology.
Legacy
The EA189 engine family, while generally reliable, has been subject to some scrutiny regarding emissions compliance. Some early versions were affected by issues related to the diesel particulate filter (DPF) and exhaust gas recirculation (EGR) systems. However, with proper maintenance and regular servicing, the 2.0 TDI engine can prove to be a durable and long-lasting powertrain. Today, the B8 A4 2.0 TDI quattro remains a popular choice in the used car market, offering a blend of practicality, performance, and refinement at an affordable price point. Its quattro all-wheel-drive system continues to be a significant selling point, particularly in regions with harsh winter weather.
