The Mini Hatch (F55) 5-door One 1.2 Automatic, produced from March 2014 to November 2017, represented the entry point into the third generation of the modern Mini lineup. Built on the UKL1 platform (internally designated F55 for the 5-door Hatch), this variant aimed to offer the iconic Mini experience with a focus on affordability and ease of use. It served as a crucial model for attracting new customers to the brand, particularly those seeking a premium small car with automatic transmission. Positioned below the Cooper and Cooper S models, the One 1.2 Automatic provided a balance between fuel efficiency, practicality, and the distinctive Mini styling.
Technical Specifications
| Brand | Mini |
| Model | Hatch |
| Generation | Hatch (F55) 5-door |
| Type (Engine) | One 1.2 (102 Hp) Automatic |
| Start of production | March, 2014 |
| End of production | November, 2017 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 5.9 l/100 km (39.9 US mpg, 47.9 UK mpg, 16.9 km/l) |
| Fuel consumption (extra urban) | 4.3 l/100 km (54.7 US mpg, 65.7 UK mpg, 23.3 km/l) |
| Fuel consumption (combined) | 4.9 l/100 km (48 US mpg, 57.6 UK mpg, 20.4 km/l) |
| CO2 emissions | 114 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 10.5 sec |
| Acceleration 0 – 62 mph | 10.5 sec |
| Acceleration 0 – 60 mph | 10 sec |
| Maximum speed | 192 km/h (119.3 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 11.5 kg/Hp, 86.8 Hp/tonne |
| Weight-to-torque ratio | 6.5 kg/Nm, 153.2 Nm/tonne |
| Power | 102 Hp @ 4000 rpm |
| Power per litre | 85.1 Hp/l |
| Torque | 180 Nm @ 1400 rpm (132.76 lb.-ft. @ 1400 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | B38A12A |
| Engine displacement | 1198 cm3 (73.11 cu. in.) |
| Number of cylinders | 3 |
| Engine configuration | Inline |
| Cylinder Bore | 78 mm (3.07 in.) |
| Piston Stroke | 83.6 mm (3.29 in.) |
| Compression ratio | 10.2:1 |
| 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 | 1175 kg (2590.43 lbs.) |
| Max. weight | 1705 kg (3758.88 lbs.) |
| Max load | 530 kg (1168.45 lbs.) |
| Trunk (boot) space – minimum | 278 l (9.82 cu. ft.) |
| Fuel tank capacity | 40 l (10.57 US gal | 8.8 UK gal) |
| Length | 3982 mm (156.77 in.) |
| Width | 1727 mm (67.99 in.) |
| Height | 1425 mm (56.1 in.) |
| Wheelbase | 2567 mm (101.06 in.) |
| Front track | 1501 mm (59.09 in.) |
| Rear (Back) track | 1501 mm (59.09 in.) |
| Ride height (ground clearance) | 146 mm (5.75 in.) |
| Minimum turning circle | 11.02 m (36.15 ft.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears and type of gearbox | 6 gears, automatic 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 |
| Tires size | 175/65 R15 84H |
| Wheel rims size | 5.5J x 15 |
Powertrain & Engine Architecture
The heart of the One 1.2 Automatic is the BMW-derived B38A12A 1.2-liter three-cylinder turbocharged engine. This engine is a key component of BMW’s modular engine family, known for its efficiency and surprisingly robust power output for its size. It utilizes direct fuel injection, ensuring precise fuel delivery and contributing to improved fuel economy and reduced emissions. The engine also features a single twin-scroll turbocharger with an intercooler, which minimizes turbo lag and provides a relatively linear power delivery. The valvetrain employs four valves per cylinder, optimized for both low-end torque and high-rpm performance. Paired with this engine is a six-speed automatic transmission (specifically, the Aisin TF60SN), chosen for its smooth operation and suitability for urban driving. This transmission is known for its reliability, but isn’t particularly sporty in its shift characteristics, prioritizing comfort over aggressive gear changes.
Driving Characteristics
The 102 horsepower and 180 Nm (133 lb-ft) of torque delivered by the One 1.2 Automatic translate to adequate, but not exhilarating, performance. Acceleration from 0-60 mph takes around 10.5 seconds, making it suitable for city commuting and highway merging, but not for spirited driving. The automatic transmission’s gear ratios are tuned for fuel efficiency, meaning it tends to upshift quickly to maintain lower engine speeds. This can sometimes result in the engine feeling strained when overtaking or climbing hills. Compared to the six-speed manual version, the automatic sacrifices some responsiveness, but offers significantly more convenience. It also feels noticeably less powerful than the Cooper models, which boast significantly more horsepower and torque.
Equipment & Trim Levels
The One 1.2 Automatic typically came standard with features like air conditioning, power windows, power mirrors, a basic audio system with USB connectivity, and stability control. Interior upholstery was generally cloth, with a focus on durable materials. Optional extras included alloy wheels, a panoramic sunroof, upgraded infotainment systems with navigation, and parking sensors. The trim level was generally considered the base model, offering a functional and well-equipped package without the premium features found in the Cooper and Cooper S variants. The interior design retained the signature Mini aesthetic, with a large central speedometer and a focus on creating a fun and stylish cabin environment.
Chassis & Braking
The F55 5-door One 1.2 Automatic utilizes a McPherson strut front suspension and a multi-link rear suspension, providing a comfortable and relatively controlled ride. The suspension tuning is geared towards everyday usability rather than outright sportiness. Brakes are ventilated discs at the front and solid discs at the rear. ABS (Anti-lock Braking System) is standard. The steering is electrically assisted, providing light and precise control. Given the car’s weight and power output, the braking system is generally adequate for normal driving conditions.
Market Reception & Comparison
Critics generally praised the Mini One 1.2 Automatic for its stylish design, comfortable interior, and fuel efficiency. However, some reviewers noted that the engine felt underpowered, particularly when fully loaded or driving uphill. Compared to other small cars in its class, the Mini One offered a more premium feel and a more engaging driving experience, but at a higher price point. The 1.5-liter three-cylinder engine found in some Cooper models offered a noticeable performance upgrade, while the diesel-powered One D provided even better fuel economy. The automatic transmission was seen as a good choice for urban drivers, but less appealing to those seeking a more sporty driving experience.
Legacy
The B38 engine family has proven to be relatively reliable, although some owners have reported issues with the timing chain and cooling system. The Aisin TF60SN automatic transmission is also generally considered durable, provided it receives regular fluid changes. On the used car market, the Mini One 1.2 Automatic remains a popular choice for those seeking a stylish and economical small car. Its relatively low running costs and iconic design continue to appeal to a wide range of buyers. However, potential buyers should be aware of the potential for timing chain issues and ensure that the car has been properly maintained.
