The Mini Convertible (F57) Cooper 1.5, producing 136 horsepower, was a key variant in the third generation of the modern Mini Convertible, produced from 2016 to 2018. Positioned as the entry-level engine option for the F57, it offered a more accessible price point and focused on fuel efficiency compared to the more powerful Cooper S and John Cooper Works models. This variant aimed to capture buyers seeking the iconic Mini Convertible experience with a balance of performance and economy. It represented a significant update over the previous R57 generation, benefiting from the UKL1 platform shared with the Mini 3-Door and 5-Door hatchbacks.
Technical Specifications
| Brand | Mini |
| Model | Convertible |
| Generation | Convertible (F57) |
| Type (Engine) | Cooper 1.5 (136 Hp) |
| Start of production | 2016 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 6.0-5.9 l/100 km (39.2 – 39.9 US mpg) |
| Fuel consumption (extra urban) | 4.5-4.3 l/100 km (52.3 – 54.7 US mpg) |
| Fuel consumption (combined) | 5.1-4.9 l/100 km (46.1 – 48 US mpg) |
| CO2 emissions | 118-114 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 | 8.3 kg/Hp |
| Weight-to-torque ratio | 5.1 kg/Nm |
| Power | 136 Hp @ 4400 rpm |
| Torque | 220 Nm @ 1250 rpm (162.26 lb.-ft. @ 1250 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 | 4.9 l (5.18 US qt | 4.31 UK qt) |
| Kerb Weight | 1130 kg (2491.22 lbs.) |
| Max. weight | 1670 kg (3681.72 lbs.) |
| Max load | 540 kg (1190.5 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 | 10.8 m (35.43 ft.) |
| Drivetrain Architecture | Front wheel drive |
| Drive wheel | Front wheel drive |
| Number of gears | 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 |
Powertrain & Engine Architecture
The heart of the F57 Cooper 1.5 Convertible is the BMW B38A15A engine, a 1.5-liter turbocharged three-cylinder petrol engine. This engine is part of BMW’s modular engine family, known for its efficiency and compact size. It utilizes direct fuel injection and a single twin-scroll turbocharger to deliver a respectable 136 horsepower and 220 Nm (162 lb-ft) of torque. The turbocharger is strategically positioned to minimize turbo lag and provide a responsive driving experience. The engine features variable valve timing (Valvetronic) and variable camshaft timing (Double VANOS) for optimized performance and fuel economy. The standard transmission for this variant was a six-speed manual, although a six-speed automatic transmission was also available as an option. The automatic transmission, while offering convenience, did slightly impact acceleration and fuel economy compared to the manual.
Driving Characteristics
The 1.5-liter engine in the F57 Cooper Convertible provides adequate performance for everyday driving. Acceleration from 0 to 60 mph takes approximately 8.4 to 8.8 seconds, depending on the transmission. While not a sports car by any means, the engine delivers a punchy mid-range, making it enjoyable for city driving and highway cruising. The manual transmission offers a more engaging driving experience, allowing drivers to fully utilize the engine’s power band. The automatic transmission, while smooth, can feel somewhat hesitant at times, particularly during quick overtaking maneuvers. The convertible top mechanism doesn’t significantly impact the car’s handling, and the chassis remains relatively stable even with the top down.
Equipment & Trim Levels
The Cooper 1.5 Convertible typically came standard with features such as air conditioning, power windows, a basic infotainment system with Bluetooth connectivity, and alloy wheels. Optional extras included a more advanced infotainment system with navigation, leather upholstery, heated seats, a premium sound system, and various styling packages. Trim levels beyond the base Cooper offered additional features and customization options. The Chili package, for example, added sport seats, a sport steering wheel, and upgraded interior trim. The Pepper package focused on exterior enhancements, such as fog lights and chrome accents.
Chassis & Braking
The F57 Convertible utilizes a McPherson strut front suspension and a multi-link rear suspension, providing a comfortable and controlled ride. The suspension is tuned to balance handling and comfort, making it suitable for a variety of road conditions. The braking system consists of ventilated disc brakes at the front and solid disc brakes at the rear. Anti-lock braking system (ABS) and electronic stability control (ESC) are standard features, enhancing safety and stability. The steering is electrically assisted, providing a light and precise feel.
Market Reception & Comparison
The Mini Convertible (F57) Cooper 1.5 was generally well-received by critics, who praised its stylish design, fun-to-drive character, and fuel efficiency. However, some reviewers noted that the 1.5-liter engine could feel underpowered, especially when fully loaded or driving uphill. Compared to the Cooper S variant, the 1.5 offered a more affordable entry point into the Mini Convertible range, but at the expense of performance. The 1.5 also offered better fuel economy than the Cooper S, making it a more practical choice for daily commuting. Reliability reports suggest that the B38 engine is generally reliable, although some owners have reported issues with the turbocharger and fuel injectors.
Legacy
The F57 Cooper 1.5 Convertible remains a popular choice in the used car market, appealing to buyers seeking a stylish and affordable convertible. The B38 engine has proven to be relatively durable, although regular maintenance is essential to ensure long-term reliability. The availability of parts and service is generally good, thanks to Mini’s extensive dealer network. As a whole, the F57 Cooper 1.5 Convertible represents a compelling package for those looking for a fun and fashionable open-top motoring experience.
