The Mini Convertible (R57) One 1.6 Automatic, produced briefly between March and August 2010, represented the entry point into the second-generation Mini Convertible range. Positioned as an accessible and stylish open-top motoring option, this variant utilized a 1.6-liter naturally aspirated engine paired with a six-speed automatic transmission. It was part of the R57 chassis code generation, which spanned from 2009 to 2015, and built upon the success of the first-generation Mini Convertible. This particular model aimed to broaden the appeal of the Mini brand to customers prioritizing ease of use and affordability over outright performance.
Technical Specifications
| Brand | Mini |
| Model | Convertible |
| Generation | Convertible (R57) |
| Type (Engine) | One 1.6 (98 Hp) Automatic |
| Start of production | March, 2010 |
| End of production | August, 2010 |
| 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 | Petrol direct injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 4.2 l (4.44 US qt | 3.7 UK qt) |
| Coolant capacity | 5.2 l (5.49 US qt | 4.58 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 | 3699 mm (145.63 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 Architecture | Front wheel drive |
| Number of gears | 6 |
| Gearbox type | Automatic transmission |
| Front suspension | Independent, McPherson with coil spring and anti-roll bar |
| Rear suspension | Semi-independent, coil spring |
| 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 LM |
Powertrain & Engine Architecture
The heart of the Mini Convertible One Automatic is the N16B16A 1.6-liter inline-four cylinder engine. This engine, a product of the Prince engine family jointly developed by BMW and PSA Peugeot Citroën, features a naturally aspirated configuration and utilizes petrol direct injection. The direct injection system, a key feature, improves fuel efficiency and power delivery compared to traditional port fuel injection. The engine boasts a compression ratio of 11:1 and is equipped with four valves per cylinder, contributing to its relatively efficient operation. The six-speed automatic transmission, a Getrag-sourced unit, was chosen for its smooth operation and ease of use, aligning with the target demographic for this trim level. Unlike some higher-performance Mini models, this engine does not feature a turbocharger or supercharger.
Driving Characteristics
The 98 horsepower and 113 lb-ft of torque produced by the 1.6-liter engine, when coupled with the automatic transmission, resulted in a relaxed and comfortable driving experience. Acceleration from 0-60 mph took approximately 12.4 seconds, and top speed was limited to 108 mph. The automatic transmission, while providing convenience, did slightly diminish the responsiveness compared to the available manual gearbox. Gear ratios were tuned for fuel economy and smooth cruising rather than spirited performance. In real-world conditions, the One Automatic proved adequate for city driving and highway cruising, but lacked the punch of the more powerful Cooper or Cooper S variants. The automatic transmission’s shift points were generally well-programmed, but could occasionally feel hesitant during quick overtaking maneuvers.
Equipment & Trim Levels
The Mini Convertible One Automatic typically came standard with features such as air conditioning, power windows, power mirrors, a CD/MP3 stereo system, and alloy wheels. Safety features included ABS brakes, airbags, and stability control. Interior upholstery was typically cloth, with options for leather upgrades. Dashboard trim could be customized with various color and material choices. Popular optional extras included a sunroof, navigation system, and upgraded sound system. The One trim generally represented a more affordable entry point, with fewer standard features compared to the Cooper and Cooper S models.
Chassis & Braking
The R57 Mini Convertible utilized a McPherson strut front suspension and a semi-independent coil spring rear suspension. The suspension setup was tuned for a balance between comfort and handling, providing a reasonably compliant ride quality. Front brakes were ventilated discs, while rear brakes were solid discs. ABS (Anti-lock Braking System) was standard. The chassis was reinforced to compensate for the lack of a fixed roof, maintaining a reasonable level of structural rigidity. Stabilizer bars were fitted front and rear to reduce body roll during cornering.
Market Reception & Comparison
The Mini Convertible One Automatic received mixed reviews. Critics praised its stylish design and comfortable ride, but noted its lack of performance compared to other models in the range. Fuel economy was generally considered good for a convertible, averaging around 35.6 US mpg in combined driving. Reliability was generally acceptable, although some owners reported minor issues with the automatic transmission. Compared to the Cooper and Cooper S variants, the One Automatic offered a more affordable entry point into Mini Convertible ownership, but at the expense of performance and some features. The 1.8L Cooper model, with its manual transmission, offered a more engaging driving experience, while the Cooper S provided significantly more power.
Legacy
The N16B16A engine, while not known for exceptional performance, proved to be a relatively reliable unit when properly maintained. The six-speed automatic transmission also demonstrated reasonable durability. Today, the Mini Convertible One Automatic represents an affordable entry point into the world of Mini ownership. Used examples are readily available, and maintenance costs are generally reasonable. However, potential buyers should be aware of the potential for minor issues with the automatic transmission and ensure that the vehicle has been regularly serviced. The R57 generation Mini Convertible, including the One Automatic variant, remains a popular choice for those seeking a stylish and fun-to-drive open-top car.
