Technical Specifications
| Brand | Mini |
| Model | Convertible |
| Generation | Convertible (R57, Facelift 2011) |
| Type (Engine) | One 1.6 (98 Hp) Automatic |
| Start of production | 2012 |
| End of production | 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 8.9 l/100 km (26.4 US mpg) |
| Fuel consumption (extra urban) | 5.3 l/100 km (44.4 US mpg) |
| Fuel consumption (combined) | 6.6 l/100 km (35.6 US mpg) |
| CO2 emissions | 154 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 13.1 sec |
| Acceleration 0 – 62 mph | 13.1 sec |
| Acceleration 0 – 60 mph | 12.4 sec |
| Maximum speed | 174 km/h (108.12 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 12.2 kg/Hp |
| Weight-to-torque ratio | 7.8 kg/Nm |
| Power | 98 Hp @ 6000 rpm |
| Torque | 153 Nm @ 3000 rpm (112.85 lb.-ft. @ 3000 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | N16B16A |
| Engine displacement | 1598 cm3 (97.52 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 77 mm (3.03 in.) |
| Piston Stroke | 85.8 mm (3.38 in.) |
| Compression ratio | 11:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated |
| Engine oil capacity | 4.2 l (4.44 US qt | 3.7 UK qt) |
| Coolant capacity | 5.5 l (5.81 US qt | 4.84 UK qt) |
| Kerb Weight | 1200 kg (2645.55 lbs.) |
| Max. weight | 1630 kg (3593.53 lbs.) |
| Max load | 430 kg (947.99 lbs.) |
| Trunk (boot) space – minimum | 125 l (4.41 cu. ft.) |
| Trunk (boot) space – maximum | 660 l (23.31 cu. ft.) |
| Fuel tank capacity | 40 l (10.57 US gal | 8.8 UK gal) |
| Length | 3723 mm (146.57 in.) |
| Width | 1683 mm (66.26 in.) |
| Height | 1414 mm (55.67 in.) |
| Wheelbase | 2467 mm (97.13 in.) |
| Front track | 1459 mm (57.44 in.) |
| Rear track | 1467 mm (57.76 in.) |
| Ride height (ground clearance) | 139 mm (5.47 in.) |
| Minimum turning circle | 10.7 m (35.1 ft.) |
| Drivetrain | Front wheel drive |
| Number of gears | 6 |
| Gearbox type | Automatic transmission |
| Front suspension | Independent, 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 |
| Tires size | 175/65 R15 84H |
| Wheel rims size | 5.5J x 15 |
The R57 Mini Convertible, launched in 2009 and receiving a facelift in 2011, brought open-top motoring to the modern Mini lineup. The 2012-2015 facelift models featured revised styling cues, improved interior materials, and updated technology. The “One” 1.6 Automatic variant, produced during this period, served as the entry-level option, appealing to buyers seeking a stylish and relatively economical convertible. Built on the 1HX0/A3 platform shared with the BMW 1 Series, the R57 aimed to retain the Mini’s iconic design and go-kart handling while offering the added enjoyment of a retractable soft top.
Powertrain & Engine Architecture
The heart of the One Convertible Automatic is the N16B16A 1.6-liter inline-four cylinder engine. This engine, a product of BMW/PSA collaboration, utilizes a naturally aspirated configuration and multi-port fuel injection. The N16 engine family is known for its relatively simple design and decent reliability. The 98 horsepower output is achieved at 6000 rpm, while peak torque of 153 Nm (112.85 lb-ft) arrives at 3000 rpm. The engine features a single overhead camshaft (SOHC) valvetrain with four valves per cylinder. The six-speed automatic transmission, a common unit in BMW and Mini applications of the era, is designed for smooth shifts and fuel efficiency. It lacks the sportiness of a dual-clutch transmission but provides a comfortable driving experience. The transmission’s gear ratios are tuned for maximizing fuel economy and providing adequate acceleration for everyday driving.
Driving Characteristics
The 1.6-liter engine and automatic transmission combination in the One Convertible delivers a relaxed driving experience. Acceleration is not its strong suit, with a 0-60 mph time of around 12.4 seconds. However, the engine provides sufficient power for urban driving and cruising on highways. The automatic transmission shifts smoothly, but can feel somewhat hesitant when requesting quick bursts of acceleration. Compared to the Cooper and Cooper S models, the One Automatic feels noticeably slower. The manual transmission versions of the One offered a more engaging driving experience, allowing drivers to better control the engine’s power band. The relatively light weight of the convertible (1200 kg / 2645.55 lbs) helps to mitigate the lack of power, and the car still retains a degree of the Mini’s characteristic nimble handling.
Equipment & Trim Levels
The One Convertible Automatic typically came equipped with standard features such as air conditioning, power windows, central locking, and a basic audio system. Interior upholstery was usually cloth, with options for leather upgrades. The dashboard layout was typical of the R57 Mini, featuring a large central speedometer and a smaller gauge for fuel and temperature. Optional extras included a panoramic sunroof, upgraded audio systems, navigation, and various cosmetic enhancements. The One trim generally lacked some of the more premium features found in the Cooper and Cooper S models, such as sport seats and more extensive chrome trim.
Chassis & Braking
The R57 Convertible utilizes an independent suspension setup, with McPherson struts at the front and a multi-link system at the rear. This configuration provides a good balance of ride comfort and handling. The front brakes are ventilated discs, while the rear brakes are solid discs. ABS (Anti-lock Braking System) is standard. The One Convertible typically featured smaller wheels and tires (175/65 R15) compared to the higher-spec models, contributing to a slightly softer ride. Stabilizer bars are present at both the front and rear to reduce body roll during cornering.
Market Reception & Comparison
The Mini Convertible One Automatic was generally well-received as an affordable and stylish entry point into the convertible market. Critics praised its retro design and fun-to-drive character, but noted its relatively modest performance. Fuel economy was a strong point, with combined figures around 35.6 US mpg. Compared to other small convertibles of the time, such as the Fiat 500C, the Mini offered a more premium feel and a more engaging driving experience. However, the Fiat was often more affordable. The Cooper and Cooper S models within the Mini lineup offered significantly more power and performance, but at a higher price point. The One Automatic appealed to buyers who prioritized style, fuel efficiency, and ease of use over outright speed.
Legacy
The N16B16A engine, while not known for being exceptionally powerful, is generally considered reliable if properly maintained. Common issues include oil leaks and occasional problems with the cooling system. The six-speed automatic transmission is also relatively robust. Today, the R57 Mini Convertible One Automatic represents an affordable entry into the world of classic Mini ownership. These cars are readily available on the used market, and parts are generally accessible. While not a performance bargain, the One Automatic offers a stylish and enjoyable open-top driving experience, making it a popular choice for those seeking a fun and fashionable convertible.
