The Mini Convertible (F57) Cooper S 2.0 Steptronic represents a compelling blend of performance and open-air motoring within the third generation of the modern Mini Convertible. Produced from 2016 to 2018, this variant occupied a mid-range position in the F57 lineup, offering a significant step up in power and driving engagement compared to the base Cooper models, while remaining more accessible than the range-topping John Cooper Works (JCW) version. It was primarily marketed towards drivers seeking a sporty and stylish convertible experience with the convenience of an automatic transmission.
Technical Specifications
| Brand | Mini |
| Model | Convertible |
| Generation | Convertible (F57) |
| Type (Engine) | Cooper S 2.0 (192 Hp) Steptronic |
| Start of production | 2016 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 7.2-7.1 l/100 km (32.7 – 33.1 US mpg) |
| Fuel consumption (extra urban) | 5.0-4.8 l/100 km (47 – 49 US mpg) |
| Fuel consumption (combined) | 5.8-5.6 l/100 km (40.6 – 42 US mpg) |
| CO2 emissions | 134-131 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.1 sec |
| Acceleration 0 – 62 mph | 7.1 sec |
| Acceleration 0 – 60 mph | 6.7 sec |
| Maximum speed | 228 km/h (141.67 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 6.4 kg/Hp |
| Weight-to-torque ratio | 4.4 kg/Nm |
| Power | 192 Hp @ 5000-6000 rpm |
| Torque | 280 Nm @ 1250-4600 rpm (206.52 lb.-ft. @ 1250-4600 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | B48A20F |
| Engine displacement | 1998 cm3 (121.93 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 94.6 mm (3.72 in.) |
| Compression ratio | 11:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 5.3 l (5.6 US qt | 4.66 UK qt) |
| Coolant | 6.1 l (6.45 US qt | 5.37 UK qt) |
| Kerb Weight | 1220 kg (2689.64 lbs.) |
| Max. weight | 1765 kg (3891.16 lbs.) |
| Max load | 545 kg (1201.52 lbs.) |
| Trunk (boot) space – minimum | 160 l (5.65 cu. ft.) |
| Trunk (boot) space – maximum | 215 l (7.59 cu. ft.) |
| Fuel tank capacity | 44 l (11.62 US gal | 9.68 UK gal) |
| Length | 3850 mm (151.57 in.) |
| Width | 1727 mm (67.99 in.) |
| Height | 1415 mm (55.71 in.) |
| Wheelbase | 2495 mm (98.23 in.) |
| Front track | 1485 mm (58.46 in.) |
| Rear (Back) track | 1485 mm (58.46 in.) |
| Ride height (ground clearance) | 115 mm (4.53 in.) |
| Drag coefficient (Cd) | 0.36 |
| Minimum turning circle | 10.8 m (35.43 ft.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears | 6 |
| Gearbox type | Automatic transmission Steptronic |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| 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 | Electric Steering |
| Tires size | 195/55 R16 87W |
| Wheel rims size | 6.5J x 16 |
INTRODUCTION
The F57 Mini Convertible, launched in 2016, represented the third generation of Mini’s open-top model. Building upon the success of its predecessors, the F57 offered increased interior space, improved refinement, and a wider range of engine options. The Cooper S 2.0 Steptronic variant, powered by the BMW B48 engine, was a popular choice for buyers seeking a balance between performance and convenience. This model year saw a refinement of the F57 platform, addressing some of the initial criticisms leveled at the previous generation.
Powertrain & Engine Architecture
At the heart of the Cooper S 2.0 Steptronic lies the BMW B48 2.0-liter turbocharged four-cylinder engine. This engine, part of BMW’s modular engine family, utilizes direct fuel injection, a twin-scroll turbocharger, and variable valve timing (VANOS) on both intake and exhaust camshafts. The B48 engine is known for its responsiveness and efficiency. The engine code, B48A20F, specifically denotes this particular configuration. The engine produces 192 horsepower at 5000-6000 rpm and 280 Nm (206.52 lb-ft) of torque between 1250 and 4600 rpm. This broad torque curve contributes to strong acceleration in everyday driving situations. The engine is paired with a 6-speed Steptronic automatic transmission, which offers smooth and quick shifts. This transmission features a torque converter and allows for both fully automatic operation and manual gear selection via steering wheel-mounted paddles or the gear selector.
Driving Characteristics
The Cooper S 2.0 Steptronic delivers a noticeably more engaging driving experience than the base Cooper models. While not as raw or focused as the JCW variant, it provides ample power for spirited driving. The automatic transmission, while convenient, does slightly diminish the sense of control compared to the 6-speed manual option. However, the Steptronic transmission is well-programmed and adapts to driving style, offering responsive shifts. The gear ratios are tuned to prioritize acceleration in the mid-range, making overtaking maneuvers easy. The front-wheel-drive layout provides good traction in most conditions, although torque steer can be noticeable under hard acceleration. The convertible top mechanism does add some weight, but the overall impact on handling is minimal.
Equipment & Trim Levels
The Cooper S 2.0 Steptronic came standard with a generous array of features, including automatic climate control, a 6.5-inch infotainment system with Mini Connected services, leather upholstery, and 16-inch alloy wheels. Optional extras included a larger 8.8-inch infotainment screen with navigation, a Harman Kardon premium sound system, heated seats, and a variety of exterior styling packages. Interior trim options ranged from basic cloth to more luxurious leather combinations. The dashboard layout is characteristic of the F57 Mini, featuring a centrally mounted circular display and a toggle switch-based control system.
Chassis & Braking
The F57 Mini Convertible utilizes a McPherson strut front suspension and a multi-link rear suspension. This setup provides a good balance between ride comfort and handling precision. The Cooper S 2.0 Steptronic features slightly stiffer springs and dampers compared to the base Cooper models, enhancing body control. The braking system consists of ventilated discs at the front and solid discs at the rear. Anti-lock braking system (ABS) is standard, along with electronic brakeforce distribution (EBD). The steering is electrically assisted and provides precise and responsive feedback.
Market Reception & Comparison
The Cooper S 2.0 Steptronic was generally well-received by automotive critics. Reviewers praised its lively performance, comfortable ride, and stylish design. The automatic transmission was noted as a convenient option for urban driving, although some preferred the engagement of the manual gearbox. Compared to the base Cooper, the Cooper S offered a significant performance upgrade. Against the JCW variant, it provided a more accessible price point and a slightly more relaxed driving experience. Fuel economy was considered respectable for a performance-oriented convertible, averaging around 40 mpg in combined driving.
Legacy
The B48 engine in the Cooper S 2.0 Steptronic has proven to be a reliable and durable powertrain. While some early B48 engines experienced issues with oil leaks, these were largely addressed with updated gaskets and seals. The Steptronic automatic transmission is also generally reliable, provided it is serviced according to the manufacturer’s recommendations. Today, the F57 Mini Convertible Cooper S 2.0 Steptronic remains a popular choice in the used car market, offering a stylish and enjoyable open-top driving experience at a relatively affordable price. Its combination of performance, practicality, and iconic Mini design ensures its continued appeal to enthusiasts.
