The Audi A4 (B5) facelift, produced from 1999 to 2000, represented a significant mid-cycle refresh of Audi’s popular compact executive car. Among the various engine and transmission combinations offered, the 1.8-liter 20-valve turbocharged engine paired with a 5-speed automatic transmission was a common choice, particularly in European markets. This variant aimed to provide a balance of performance and convenience, appealing to buyers who desired the A4’s refinement without the involvement of a manual gearbox. It sat firmly in the mid-range of the B5 A4 lineup, offering more power than the base 1.6-liter models but falling short of the performance-oriented 2.8-liter V6 and the fuel-efficient TDI diesels.
Technical Specifications
| Brand | Audi |
| Model | A4 |
| Generation | A4 (B5, Typ 8D, facelift 1999) |
| Type (Engine) | 1.8 20V Turbo (150 Hp) |
| Start of production | 1999 |
| End of production | 2000 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 11.1 l/100 km (21.2 US mpg, 25.4 UK mpg, 9 km/l) |
| Fuel consumption (extra urban) | 6.5 l/100 km (36.2 US mpg, 43.5 UK mpg, 15.4 km/l) |
| Fuel consumption (combined) | 8.2 l/100 km (28.7 US mpg, 34.4 UK mpg, 12.2 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.4 sec |
| Acceleration 0 – 62 mph | 8.4 sec |
| Acceleration 0 – 60 mph | 8 sec (Calculated) |
| Maximum speed | 221 km/h (137.32 mph) |
| Weight-to-power ratio | 8.4 kg/Hp, 119.5 Hp/tonne |
| Weight-to-torque ratio | 6 kg/Nm, 167.3 Nm/tonne |
| Power | 150 Hp @ 5700 rpm |
| Power per litre | 84.2 Hp/l |
| Torque | 210 Nm @ 1750-4600 rpm (154.89 lb.-ft. @ 1750-4600 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | AEB, ANB, APU, AWT |
| Engine displacement | 1781 cm3 (108.68 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 81 mm (3.19 in.) |
| Piston Stroke | 86.4 mm (3.4 in.) |
| Compression ratio | 9.5:1 |
| Number of valves per cylinder | 5 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Turbocharger |
| Valvetrain | DOHC |
| Engine oil capacity | 3.5 l (3.7 US qt | 3.08 UK qt) |
| Coolant capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Kerb Weight | 1255 kg (2766.8 lbs.) |
| Max. weight | 1805 kg (3979.34 lbs.) |
| Max load | 550 kg (1212.54 lbs.) |
| Trunk (boot) space – minimum | 440 l (15.54 cu. ft.) |
| Fuel tank capacity | 62 l (16.38 US gal | 13.64 UK gal) |
| Length | 4479 mm (176.34 in.) |
| Width | 1733 mm (68.23 in.) |
| Height | 1415 mm (55.71 in.) |
| Wheelbase | 2617 mm (103.03 in.) |
| Front track | 1498 mm (58.98 in.) |
| Rear track | 1479 mm (58.23 in.) |
| Drag coefficient (Cd) | 0.31 |
| Minimum turning circle | 11.1 m (36.42 ft.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears | 5 |
| Gearbox type | Automatic |
| Front suspension | Wishbone |
| Rear suspension | Suspension with traction connecting levers |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic |
| Tires size | 195/65 R15 |
| Wheel rims size | 15 |
Powertrain & Engine Architecture
The heart of this A4 variant is the 1.8-liter, 1984cc inline-four cylinder engine, typically identified by engine codes AEB, ANB, APU, or AWT. This engine is a 20-valve design, featuring dual overhead camshafts (DOHC) and five valves per cylinder – three intake and two exhaust. The key to its performance is a K03 turbocharger, providing forced induction to increase power output. Fuel delivery is managed by a Bosch Motronic multi-port fuel injection system. The automatic transmission used is a 5-speed unit, offering smooth shifts but sacrificing some of the responsiveness found in the manual transmission versions. This transmission was designed to handle the 210 Nm (155 lb-ft) of torque produced by the engine, offering a comfortable driving experience.
Driving Characteristics
The 1.8T automatic A4 offered a comfortable and refined driving experience. Acceleration from 0-60 mph took around 8.4 seconds, which was respectable for the time but noticeably slower than the manual transmission equipped models. The automatic transmission, while convenient, resulted in some power loss and a less engaging driving feel. Gear ratios were tuned for fuel efficiency and smooth cruising, rather than outright performance. In real-world driving, the engine provided adequate power for everyday commuting and highway driving, but lacked the punch needed for spirited acceleration or overtaking maneuvers. The turbocharger did provide a noticeable boost in power once spooled up, but there was some degree of turbo lag.
Equipment & Trim Levels
The 1.8T automatic A4 typically came standard with features such as power windows, power locks, air conditioning, and an AM/FM radio. Higher trim levels, often denoted by “S” or “Quattro” badges (though Quattro was not available with this engine/transmission combination), added features like leather upholstery, sunroof, upgraded audio systems, and alloy wheels. Optional extras included heated seats, automatic climate control, and a navigation system. Interior upholstery was typically cloth, with leather being an upgrade option. The dashboard layout was functional and well-designed, with clear instrumentation and intuitive controls.
Chassis & Braking
The B5 A4 featured an independent suspension system, with wishbones at the front and a semi-independent suspension with trailing arms at the rear. This setup provided a comfortable ride and good handling characteristics. Brakes were disc brakes on all four wheels, providing adequate stopping power. Anti-lock Braking System (ABS) was standard equipment. The 1.8T automatic models typically had a slightly softer suspension setup compared to the sportier variants, prioritizing ride comfort over handling precision. Stabilizer bars were present at both the front and rear, helping to reduce body roll during cornering.
Market Reception & Comparison
The 1.8T automatic A4 was well-received by critics as a practical and refined compact executive car. It offered a good balance of performance, comfort, and fuel economy. However, some reviewers noted that the automatic transmission dulled the engine’s performance and that the manual transmission versions were more engaging to drive. Compared to the 2.8-liter V6 models, the 1.8T offered less power but significantly better fuel economy. Compared to the TDI diesel models, the 1.8T offered more power but lower fuel efficiency. Reliability was generally good, although the turbocharger and automatic transmission were potential areas for concern.
Legacy
The 1.8T engine became a mainstay in the Audi and Volkswagen lineups for many years, known for its tunability and reliability. The B5 A4, in general, is considered a well-built and durable car. Today, the 1.8T automatic A4 can be found on the used car market at affordable prices. While not the most exciting variant, it remains a practical and comfortable choice for those seeking a reliable and refined compact executive car. Common issues with these vehicles include oil leaks, failing mass airflow sensors, and occasional transmission problems. However, with proper maintenance, these cars can provide many years of reliable service.
