Technical Specifications
| Brand | Mini |
| Model | Convertible |
| Generation | Convertible (F57, facelift 2021) |
| Type (Engine) | JCW 2.0 (231 Hp) Steptronic |
| Start of production | March, 2021 |
| End of production | February, 2024 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Combined fuel consumption (WLTP) | 6.9-7.1 l/100 km (34.1 – 33.1 US mpg, 40.9 – 39.8 UK mpg, 14.5 – 14.1 km/l) |
| CO2 emissions (WLTP) | 156-162 g/km |
| Fuel consumption (urban) | 7.6-7.9 l/100 km (30.9 – 29.8 US mpg, 37.2 – 35.8 UK mpg, 13.2 – 12.7 km/l) |
| Fuel consumption (extra urban) | 5.4-5.6 l/100 km (43.6 – 42 US mpg, 52.3 – 50.4 UK mpg, 18.5 – 17.9 km/l) |
| Fuel consumption (combined) | 6.2-6.4 l/100 km (37.9 – 36.8 US mpg, 45.6 – 44.1 UK mpg, 16.1 – 15.6 km/l) |
| CO2 emissions (NEDC) | 142-147 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.5 sec |
| Acceleration 0 – 62 mph | 6.5 sec |
| Acceleration 0 – 60 mph | 6.2 sec |
| Maximum speed | 241 km/h (149.75 mph) |
| Emission standard | Euro 6d |
| Weight-to-power ratio | 6 kg/Hp, 168 Hp/tonne |
| Weight-to-torque ratio | 4.3 kg/Nm, 232.7 Nm/tonne |
| Power | 231 Hp @ 5200-6200 rpm |
| Power per litre | 115.6 Hp/l |
| Torque | 320 Nm @ 1450-4800 rpm (236.02 lb.-ft. @ 1450-4800 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | B48A20B |
| 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 | 10.2:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 5.25 l (5.55 US qt | 4.62 UK qt) |
| Kerb Weight | 1375 kg (3031.36 lbs.) |
| Max. weight | 1795 kg (3957.3 lbs.) |
| Max load | 420 kg (925.94 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 | 3872 mm (152.44 in.) |
| Width | 1727 mm (67.99 in.) |
| Width including mirrors | 1932 mm (76.06 in.) |
| Height | 1415 mm (55.71 in.) |
| Wheelbase | 2495 mm (98.23 in.) |
| Front track | 1485 mm (58.46 in.) |
| Rear 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 | 8 |
| Gearbox type | automatic transmission Steptronic |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link spring suspension with stabilizer, Trailing arm |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
The Mini Convertible John Cooper Works (JCW) 2.0 Steptronic, produced from March 2021 to February 2024, represents the performance pinnacle of the F57 facelift generation of Mini Convertibles. Positioned as the flagship trim, it offered a significant step up in power and driving dynamics compared to the Cooper and Cooper S variants. This model aimed to deliver an engaging open-top driving experience with a focus on sporty performance, blending the iconic Mini design with modern technology. It primarily targeted enthusiasts seeking a premium, fun-to-drive convertible with a strong brand identity, particularly in European and North American markets.
Powertrain & Engine Architecture
At the heart of the JCW Convertible lies the BMW-sourced B48A20B 2.0-liter turbocharged inline-four engine. This engine is a member of the modular B-series family, known for its efficiency and performance. It utilizes direct fuel injection, a twin-scroll turbocharger, and an intercooler to deliver 231 horsepower at 5200-6200 rpm and 320 Nm (236 lb-ft) of torque between 1450 and 4800 rpm. The engine features a double overhead camshaft (DOHC) valvetrain with four valves per cylinder. The Steptronic 8-speed automatic transmission is standard, offering smooth and relatively quick shifts. This transmission is programmed for both efficient cruising and responsive acceleration, with paddle shifters available for manual control.
Driving Characteristics
The JCW 2.0 Steptronic offers a noticeably more engaging driving experience than the standard Cooper or Cooper S Convertible. While the automatic transmission doesn’t provide the ultimate control of a manual gearbox, it’s well-tuned to the engine’s characteristics. Acceleration from 0 to 60 mph takes approximately 6.2 seconds, and the car reaches a top speed of 149.75 mph. The steering is precise and well-weighted, providing good feedback to the driver. The suspension is firm, offering good body control in corners, but it can be a bit harsh on rough road surfaces. The exhaust note is also more aggressive than the lower trims, adding to the sporty character. The automatic transmission’s gear ratios are optimized for both acceleration and fuel efficiency, but some drivers may find it occasionally hesitant during quick overtaking maneuvers.
Equipment & Trim Levels
The JCW Convertible came standard with a comprehensive list of features, including a sport leather steering wheel, sport seats, automatic climate control, and a 8.8-inch touchscreen infotainment system with navigation. Standard safety features included automatic emergency braking, lane departure warning, and parking sensors. Optional extras included a head-up display, a Harman Kardon premium sound system, and various customization options for the interior and exterior. The JCW trim also featured unique exterior styling elements, such as a more aggressive front bumper, side skirts, and a rear spoiler. Interior trim options included various leather upholstery colors and finishes, as well as carbon fiber accents.
Chassis & Braking
The JCW Convertible utilizes an independent suspension setup, with McPherson struts at the front and a multi-link system at the rear. This setup provides a good balance between ride comfort and handling performance. The car is equipped with ventilated disc brakes at the front and solid disc brakes at the rear. The braking system is responsive and provides ample stopping power. The JCW trim also features a slightly stiffer suspension setup compared to the Cooper and Cooper S models, further enhancing handling. A stabilizer bar is included at both the front and rear to reduce body roll during cornering.
Market Reception & Comparison
The JCW Convertible was generally well-received by automotive critics, who praised its sporty handling, powerful engine, and stylish design. However, some reviewers noted that the ride could be a bit firm for everyday use. Compared to the Cooper S Automatic, the JCW offered a significant performance upgrade, but at a higher price point. The JCW also offered better fuel economy than some of its competitors, such as the Audi A3 Cabriolet and the BMW 2 Series Convertible. Reliability reports suggest that the B48 engine is generally reliable, but owners should be aware of potential issues with the turbocharger and fuel injectors.
Legacy
The F57 JCW Convertible represents a compelling offering in the premium compact convertible segment. The B48 engine and Steptronic transmission have proven to be a durable and capable combination. On the used car market, these models hold their value relatively well, particularly those with low mileage and a full service history. The JCW trim remains a desirable option for enthusiasts seeking a fun-to-drive and stylish convertible with a strong brand heritage. While newer Mini Convertible models have emerged, the F57 JCW continues to be a popular choice for those seeking a blend of performance, style, and open-top driving enjoyment.
