The Mini Convertible (F57) facelift Cooper 1.5, produced from 2018, represents a mid-cycle refresh of the F57 generation, which launched in 2016. This variant, powered by a 1.5-liter three-cylinder engine producing 136 horsepower, occupied the entry-level position in the Convertible lineup, offering an accessible and fuel-efficient option within the broader Mini range. It built upon the success of the F56 hatchback, translating the iconic Mini design and handling characteristics into a stylish and engaging open-top experience for the North American and European markets. The facelift brought subtle styling updates, enhanced technology, and refined engine options, solidifying the Convertible’s appeal as a premium small car.
Technical Specifications
| Brand | Mini |
| Model | Convertible |
| Generation | Convertible (F57, facelift 2018) |
| Type (Engine) | Cooper 1.5 (136 Hp) |
| Start of production | 2018 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 5.9-6.0 l/100 km (39.9 – 39.2 US mpg) |
| Fuel consumption (extra urban) | 4.3-4.5 l/100 km (54.7 – 52.3 US mpg) |
| Fuel consumption (combined) | 4.9-5.1 l/100 km (48 – 46.1 US mpg) |
| CO2 emissions | 114-118 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.8 sec |
| Acceleration 0 – 62 mph | 8.8 sec |
| Acceleration 0 – 60 mph | 8.4 sec |
| Maximum speed | 208 km/h (129.25 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 8.9 kg/Hp |
| Weight-to-torque ratio | 5.2 kg/Nm |
| Power | 136 Hp @ 4400-6000 rpm |
| Torque | 230 Nm @ 1250-4300 rpm (169.64 lb.-ft. @ 1250-4300 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | B38A15A |
| Engine displacement | 1499 cm3 (91.47 cu. in.) |
| Number of cylinders | 3 |
| 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 | 4.25 l (4.49 US qt | 3.74 UK qt) |
| Coolant | 5.7 l (6.02 US qt | 5.02 UK qt) |
| Kerb Weight | 1205 kg (2656.57 lbs.) |
| Max. weight | 1670 kg (3681.72 lbs.) |
| Max load | 465 kg (1025.15 lbs.) |
| Trunk (boot) space – minimum | 160 l (5.65 cu. ft.) |
| Trunk (boot) space – maximum | 215 l (7.59 cu. ft.) |
| Fuel tank capacity | 40 l (10.57 US gal | 8.8 UK gal) |
| Length | 3821 mm (150.43 in.) |
| Width | 1727 mm (67.99 in.) |
| Height | 1415 mm (55.71 in.) |
| Wheelbase | 2495 mm (98.23 in.) |
| Front track | 1501 mm (59.09 in.) |
| Rear (Back) track | 1501 mm (59.09 in.) |
| Ride height (ground clearance) | 115 mm (4.53 in.) |
| Drag coefficient (Cd) | 0.34 |
| Minimum turning circle (turning diameter) | 10.8 m (35.43 ft.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears and type of gearbox | 6 gears, manual transmission |
| 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 | 175/65 R15 84H |
| Wheel rims size | 5.5J x 15 |
Powertrain & Engine Architecture
At the heart of the Cooper 1.5 Convertible lies the BMW Group’s B38A15A engine, a 1.5-liter inline three-cylinder gasoline engine. This engine is a key component of the UKL platform, shared with several Mini and BMW models. It utilizes direct fuel injection, a single twin-scroll turbocharger, and variable valve timing (VANOS) to deliver a balance of performance and efficiency. The engine’s compact size and lightweight construction contribute to the car’s nimble handling. The 136 horsepower output is achieved between 4400 and 6000 rpm, while peak torque of 230 Nm (169.64 lb-ft) is available from a low 1250 rpm, providing good responsiveness in everyday driving. The engine is paired with a six-speed manual transmission as standard, offering precise gear changes and driver engagement. An optional six-speed automatic transmission was also available, providing convenience, especially in urban environments.
Driving Characteristics
The 1.5-liter Cooper Convertible, with its 136 hp and manual transmission, offers a fun and engaging driving experience, albeit not a particularly rapid one. Acceleration from 0-60 mph takes around 8.4 seconds, and top speed is 129.25 mph. The engine’s strong low-end torque makes it feel lively around town, and the short gear ratios of the manual transmission encourage frequent shifting. Compared to the more powerful Cooper S or John Cooper Works variants, the 1.5 feels less urgent, but it’s more than adequate for most driving situations. The automatic transmission, while convenient, can feel slightly less responsive and detract from the overall driving experience. The Convertible’s chassis is well-tuned, providing a comfortable ride without sacrificing handling agility. The electric power steering offers precise control and good feedback.
Equipment & Trim Levels
The Cooper 1.5 Convertible typically came equipped with a respectable level of standard features. These included air conditioning, power windows and locks, a basic infotainment system with Bluetooth connectivity, and alloy wheels. Interior upholstery was typically cloth, with options for leather upgrades. The dashboard layout was characteristic of the F57 generation, featuring a centrally mounted circular display and a user-friendly interface. Optional extras included a premium sound system, navigation, heated seats, and a variety of styling packages. The Convertible also offered a range of customization options, allowing buyers to personalize their car with different colors, trims, and accessories.
Chassis & Braking
The F57 Convertible utilizes a McPherson strut front suspension and a multi-link rear suspension, providing a good balance of ride comfort and handling precision. The suspension setup is tuned to be slightly softer than that of the hatchback, to account for the Convertible’s increased weight and reduced structural rigidity. Brakes consisted of ventilated discs at the front and solid discs at the rear. ABS (Anti-lock Braking System) was standard, providing enhanced safety in emergency braking situations. The steering system is an electric power-assisted rack and pinion, offering precise control and a responsive feel.
Market Reception & Comparison
The Mini Convertible Cooper 1.5 was generally well-received by critics as an accessible and stylish entry point into the Convertible market. It was praised for its fuel efficiency, nimble handling, and iconic design. However, some reviewers noted that the 1.5-liter engine could feel underpowered, especially when fully loaded or on steep inclines. Compared to the Cooper S, the 1.5 offered significantly lower running costs but lacked the same level of performance. The 1.5 also offered a more affordable price point, making it an attractive option for buyers who prioritized style and fuel economy over outright speed.
Legacy
The B38 engine family, including the 1.5-liter variant, has proven to be relatively reliable, although some owners have reported issues with the timing chain and cooling system. Regular maintenance, including oil changes and coolant flushes, is crucial for ensuring long-term reliability. On the used car market, the Cooper 1.5 Convertible represents a good value proposition, offering a stylish and fun-to-drive open-top experience at a reasonable price. Its fuel efficiency and relatively low maintenance costs make it an appealing option for those seeking a practical and enjoyable small car.
