The Audi A4 Cabriolet (B7 8H) 1.8T, produced between 2005 and 2008, represented a compelling entry point into Audi’s premium open-top market. Positioned within the B7 generation of the A4 Cabriolet – itself based on the Volkswagen Group’s PL45 (also known as 1HX0/A3) platform – this variant offered a blend of style, comfort, and reasonable performance. It served as a more accessible alternative to the higher-performance models like the 3.2 FSI quattro, appealing to buyers prioritizing a refined driving experience over outright speed. The 1.8T engine, a mainstay of the Audi lineup, was paired with a five-speed automatic transmission in this configuration, making it a popular choice for those seeking convenience and ease of use.
Technical Specifications
| Brand | Audi |
| Model | A4 |
| Generation | A4 Cabriolet (B7 8H) |
| Type (Engine) | 1.8 T (163 Hp) |
| Start of production | 2005 |
| End of production | 2008 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 11.6 l/100 km (20.3 US mpg, 24.4 UK mpg, 8.6 km/l) |
| Fuel consumption (extra urban) | 6.7 l/100 km (35.1 US mpg, 42.2 UK mpg, 14.9 km/l) |
| Fuel consumption (combined) | 8.5 l/100 km (27.7 US mpg, 33.2 UK mpg, 11.8 km/l) |
| CO2 emissions | 204 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 9.4 sec |
| Acceleration 0 – 62 mph | 9.4 sec |
| Acceleration 0 – 60 mph | 8.9 sec |
| Maximum speed | 226 km/h (140.43 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 9.4 kg/Hp, 105.8 Hp/tonne |
| Weight-to-torque ratio | 6.8 kg/Nm, 146.1 Nm/tonne |
| Power | 163 Hp @ 5700 rpm |
| Power per litre | 91.5 Hp/l |
| Torque | 225 Nm @ 1950-4700 rpm (165.95 lb.-ft. @ 1950-4700 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | BFB |
| 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 | 9.3:1 |
| Number of valves per cylinder | 5 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 4.1 l (4.33 US qt | 3.61 UK qt) |
| Coolant | 8 l (8.45 US qt | 7.04 UK qt) |
| Kerb Weight | 1540 kg (3395.12 lbs.) |
| Max. weight | 2020 kg (4453.34 lbs.) |
| Max load | 480 kg (1058.22 lbs.) |
| Trunk (boot) space – minimum | 246 l (8.69 cu. ft.) |
| Trunk (boot) space – maximum | 315 l (11.12 cu. ft.) |
| Fuel tank capacity | 70 l (18.49 US gal | 15.4 UK gal) |
| 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 | 4573 mm (180.04 in.) |
| Width | 1777 mm (69.96 in.) |
| Height | 1391 mm (54.76 in.) |
| Wheelbase | 2654 mm (104.49 in.) |
| Front track | 1523 mm (59.96 in.) |
| Rear (Back) track | 1523 mm (59.96 in.) |
| Drag coefficient (Cd) | 0.30 |
| Minimum turning circle (turning diameter) | 11.1 m (36.42 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 | 5 gears, manual transmission |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 205/55 R16 |
| Wheel rims size | 7J x 16 |
Powertrain & Engine Architecture
The heart of the A4 Cabriolet 1.8T was the BFB engine code, a 1.8-liter inline-four cylinder turbocharged gasoline engine. This engine was a refined evolution of the long-running EA888 family. It featured multi-point fuel injection and a single turbocharger with an intercooler to mitigate turbo lag and improve efficiency. The engine’s double overhead camshafts (DOHC) operated five valves per cylinder, enhancing breathing and contributing to its respectable power output. The five-speed automatic transmission, typically a Tiptronic unit, was designed to provide smooth shifts and driver control. While not known for its blistering speed, the automatic transmission offered a comfortable and convenient driving experience. The engine produced 163 horsepower at 5700 rpm and 225 Nm (165.95 lb-ft) of torque between 1950 and 4700 rpm.
Driving Characteristics
The 1.8T automatic A4 Cabriolet offered a comfortable and relaxed driving experience. Acceleration from 0-60 mph took around 8.9 seconds, which was adequate for everyday driving but noticeably slower than the more powerful variants. The automatic transmission, while smooth, could sometimes feel hesitant during quick overtaking maneuvers. The gear ratios were tuned for fuel efficiency and comfort rather than outright performance. Compared to the six-speed manual version, the automatic offered less driver engagement but greater ease of use, particularly in urban traffic. The turbocharger provided a noticeable boost in power, but turbo lag was present, especially at lower engine speeds. The front-wheel-drive configuration provided predictable handling, but lacked the all-weather confidence of the quattro all-wheel-drive system available on other A4 models.
Equipment & Trim Levels
The 1.8T Cabriolet typically came with a respectable level of standard equipment. This included features like air conditioning, power windows, power mirrors, a basic audio system, and alloy wheels. Interior upholstery was usually cloth, although leather options were available. Optional extras included a premium audio system, heated seats, automatic climate control, and a wind deflector to reduce turbulence in the cabin with the top down. Trim levels varied slightly depending on the market, but generally, the 1.8T represented a mid-range offering, positioned above the base models but below the more luxurious and performance-oriented trims.
Chassis & Braking
The B7 A4 Cabriolet utilized an independent multi-link suspension system at both the front and rear, providing a comfortable ride and good handling characteristics. The front suspension featured ventilated disc brakes, while the rear brakes were typically solid discs. Anti-lock Braking System (ABS) was standard. The chassis was reinforced to compensate for the lack of a fixed roof, providing adequate torsional rigidity. Stabilizer bars were fitted front and rear to reduce body roll during cornering. The weight distribution was reasonably balanced, contributing to predictable handling.
Market Reception & Comparison
The A4 Cabriolet 1.8T was generally well-received by automotive critics as a stylish and comfortable open-top car. However, some reviewers noted that the 1.8T engine, while adequate, lacked the punch of the larger engines available in the A4 range. Fuel economy was considered reasonable for a car of its class, averaging around 27.7 US mpg in combined driving. Compared to the 3.2 FSI quattro, the 1.8T offered a lower price point and better fuel economy, but at the expense of performance. Compared to the 1.9 TDI diesel variant, the 1.8T offered a smoother and quieter driving experience, but with lower fuel economy and higher running costs.
Legacy
The B7 A4 Cabriolet 1.8T has proven to be a relatively reliable car, with the 1.8T engine being known for its durability. However, like all cars of this age, regular maintenance is crucial. Common issues include oil leaks, turbocharger wear, and occasional problems with the automatic transmission. Today, the A4 Cabriolet 1.8T represents an affordable entry point into the Audi Cabriolet world. It remains a popular choice for those seeking a stylish and comfortable open-top car for weekend cruising, and well-maintained examples continue to hold their value in the used car market.
