The Audi A4 (B8 8K) 1.8 TFSI quattro, produced from June 2008 to 2011, represented a key offering in Audi’s popular executive car lineup. Positioned as a mid-range variant within the B8 generation (internally designated 8K), this model combined a turbocharged four-cylinder engine with Audi’s renowned quattro all-wheel-drive system. It aimed to deliver a balance of performance, efficiency, and all-weather capability, appealing to buyers seeking a premium sedan experience without the higher price tag of the more powerful models like the 2.0 TFSI or 3.2 FSI. The B8 A4 was a significant step forward for Audi, introducing a new design language and a host of technological advancements.
Technical Specifications
| Brand | Audi |
| Model | A4 |
| Generation | A4 (B8 8K) |
| Type (Engine) | 1.8 TFSI (160 Hp) quattro |
| Start of production | June, 2008 |
| End of production | 2011 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 10.3 l/100 km (22.8 US mpg, 27.4 UK mpg, 9.7 km/l) |
| Fuel consumption (extra urban) | 6.1 l/100 km (38.6 US mpg, 46.3 UK mpg, 16.4 km/l) |
| Fuel consumption (combined) | 7.6 l/100 km (30.9 US mpg, 37.2 UK mpg, 13.2 km/l) |
| CO2 emissions | 176 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.6 sec |
| Acceleration 0 – 62 mph | 8.6 sec |
| Acceleration 0 – 60 mph | 8.2 sec |
| Maximum speed | 225 km/h (139.81 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 9.1 kg/Hp, 110.3 Hp/tonne |
| Weight-to-torque ratio | 5.8 kg/Nm, 172.4 Nm/tonne |
| Power | 160 Hp @ 4500-6200 rpm |
| Power per litre | 89 Hp/l |
| Torque | 250 Nm @ 1500-4500 rpm (184.39 lb.-ft. @ 1500-4500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | EA888 / CDHB |
| Engine displacement | 1798 cm3 (109.72 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 82.5 mm (3.25 in.) |
| Piston Stroke | 84.1 mm (3.31 in.) |
| Compression ratio | 9.6:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 4.6 l (4.86 US qt | 4.05 UK qt) |
| Coolant | 7 l (7.4 US qt | 6.16 UK qt) |
| Kerb Weight | 1450 kg (3196.7 lbs.) |
| Max. weight | 2000 kg (4409.25 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 | 65 l (17.17 US gal | 14.3 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 | 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) | 0.286 |
| Minimum turning circle (turning diameter) | 11.5 m (37.73 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives permanently the four wheels of the vehicle. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 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 | 7J x 16 |
Powertrain & Engine Architecture
At the heart of the A4 1.8 TFSI quattro lies the EA888 engine, specifically the CDHB variant. This 1.8-liter inline-four engine utilizes direct fuel injection (FSI) and a single turbocharger with an intercooler to deliver 160 horsepower and 184 lb-ft of torque. The engine’s design emphasized efficiency and responsiveness. The direct injection system allowed for precise fuel delivery, optimizing combustion and reducing emissions. The turbocharger provided a boost in power, particularly at lower engine speeds, enhancing drivability. The engine’s valvetrain featured a dual overhead camshaft (DOHC) design with four valves per cylinder, further contributing to its performance characteristics. The transmission offered was a 6-speed manual. This transmission was chosen for its balance of efficiency and driver engagement.
Driving Characteristics
The 1.8 TFSI quattro offered a refined driving experience. While not as overtly sporty as the higher-powered A4 variants, it provided ample power for everyday driving and comfortable highway cruising. The quattro all-wheel-drive system delivered excellent traction in all weather conditions, enhancing stability and confidence. The 6-speed manual transmission allowed for precise gear selection, and the engine’s torque curve provided good responsiveness across a wide range of engine speeds. Compared to the 2.0 TFSI, the 1.8 TFSI felt less urgent in its acceleration, but it offered a smoother and more relaxed driving experience. The manual transmission, while engaging, didn’t offer the seamlessness of the optional S tronic dual-clutch transmission available on other A4 models.
Equipment & Trim Levels
The A4 1.8 TFSI quattro typically came standard with a respectable level of equipment. This included features like automatic climate control, power windows and locks, a multi-function steering wheel, and an audio system with CD player. Upholstery was typically cloth, although leather options were available. Higher trim levels offered upgrades such as sunroof, navigation system, premium audio, and heated front seats. The interior design was typically understated and elegant, reflecting Audi’s commitment to quality and refinement.
Chassis & Braking
The B8 A4 featured a sophisticated chassis design. The front suspension utilized an independent multi-link setup, while the rear suspension employed an independent multi-link spring suspension with a stabilizer bar. This configuration provided a comfortable ride and precise handling. The braking system consisted of ventilated discs at the front and solid discs at the rear, providing adequate stopping power for the vehicle’s weight and performance. Anti-lock braking system (ABS) was standard, enhancing safety and control during emergency braking situations.
Market Reception & Comparison
The Audi A4 1.8 TFSI quattro was generally well-received by automotive critics. It was praised for its refined driving experience, comfortable ride, and all-weather capability. However, some critics noted that the 1.8 TFSI engine lacked the outright performance of the 2.0 TFSI. In terms of fuel economy, the 1.8 TFSI quattro offered a slight advantage over the more powerful variants, but the difference was not substantial. Reliability was generally good, although some owners reported minor issues with the turbocharger and fuel injection system. Compared to competitors like the BMW 320i and Mercedes-Benz C200, the A4 1.8 TFSI quattro offered a compelling combination of performance, luxury, and value.
Legacy
The Audi A4 (B8) 1.8 TFSI quattro has proven to be a relatively reliable and durable vehicle. The EA888 engine, while not without its potential issues, is generally considered to be a robust and long-lasting powerplant. Today, these vehicles can be found on the used car market at attractive prices. They represent a good value for buyers seeking a premium sedan with all-wheel drive. Regular maintenance, including timely oil changes and inspections, is crucial to ensure the continued reliability of these vehicles. The B8 A4 1.8 TFSI quattro remains a popular choice among enthusiasts and everyday drivers alike, a testament to its enduring appeal and quality.
