The Mini Hatch (F55) 5-door Cooper D 1.5 Automatic, produced from March 2014 to 2018, represents a key variant within the third generation of the iconic Mini Hatchback. Positioned as a fuel-efficient and practical option, this model combined a 1.5-liter three-cylinder diesel engine with a six-speed automatic transmission. It catered to buyers seeking the Mini’s distinctive styling and handling characteristics with the convenience of an automatic gearbox and the economy of a diesel powerplant. This variant played a significant role in expanding the Mini’s appeal to a broader audience, particularly in European markets where diesel engines were highly prevalent.
Technical Specifications
| Brand | Mini |
| Model | Hatch |
| Generation | Hatch (F55) 5-door |
| Type (Engine) | Cooper D 1.5 (116 Hp) Automatic |
| Start of production | March, 2014 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 4.3 – 4.4 l/100 km (54.7 – 53.5 US mpg, 65.7 – 64.2 UK mpg, 23.3 – 22.7 km/l) |
| Fuel consumption (extra urban) | 3.5 – 3.6 l/100 km (67.2 – 65.3 US mpg, 80.7 – 78.5 UK mpg, 28.6 – 27.8 km/l) |
| Fuel consumption (combined) | 3.8 – 3.9 l/100 km (61.9 – 60.3 US mpg, 74.3 – 72.4 UK mpg, 26.3 – 25.6 km/l) |
| CO2 emissions | 99 – 102 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 9.5 sec |
| Acceleration 0 – 62 mph | 9.5 sec |
| Acceleration 0 – 60 mph | 9 sec |
| Maximum speed | 202 km/h (125.52 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 10.4 kg/Hp, 96.3 Hp/tonne |
| Weight-to-torque ratio | 4.5 kg/Nm, 224.1 Nm/tonne |
| Power | 116 Hp @ 4000 rpm |
| Power per litre | 77.5 Hp/l |
| Torque | 270 Nm @ 1750 rpm (199.14 lb.-ft. @ 1750 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | B37C15A |
| Engine displacement | 1496 cm3 (91.29 cu. in.) |
| Number of cylinders | 3 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 90 mm (3.54 in.) |
| Compression ratio | 16.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 4.8 l (5.07 US qt | 4.22 UK qt) |
| Coolant | 6 l (6.34 US qt | 5.28 UK qt) |
| Kerb Weight | 1205 kg (2656.57 lbs.) |
| Max. weight | 1735 kg (3825.02 lbs.) |
| Max load | 530 kg (1168.45 lbs.) |
| Trunk (boot) space – minimum | 278 l (9.82 cu. ft.) |
| Trunk (boot) space – maximum | 941 l (33.23 cu. ft.) |
| Fuel tank capacity | 44 l (11.62 US gal | 9.68 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 m (36.09 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the front wheels of the vehicle. |
| Drive wheel | 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 |
INTRODUCTION
The F55 Mini Hatch 5-door, launched in 2014, represented a significant expansion of the Mini lineup, offering increased practicality without sacrificing the brand’s core values of style and driving enjoyment. The Cooper D 1.5 Automatic variant, powered by the BMW Group’s B37C15A engine, was a popular choice, particularly in Europe, where diesel-powered vehicles were favored for their fuel efficiency. This model occupied a mid-range position within the 5-door Hatch portfolio, offering a balance between performance, economy, and convenience. It sat below the more powerful Cooper S variants and above the entry-level One D models.
Powertrain & Engine Architecture
The heart of the Cooper D 1.5 Automatic is the B37C15A, a 1.5-liter inline three-cylinder diesel engine. This engine is part of BMW’s modular engine family and features a single turbocharger with an intercooler to enhance performance. The engine utilizes a common-rail direct fuel injection system, delivering fuel at extremely high pressure for optimized combustion. The valvetrain employs four valves per cylinder, contributing to efficient gas exchange. The engine’s aluminum block and head help to reduce weight. The six-speed automatic transmission, sourced from Aisin, was specifically tuned to complement the engine’s torque characteristics. It features a torque converter and electronic control for smooth and efficient gear changes. This transmission wasn’t known for being particularly sporty, prioritizing comfort and fuel economy over rapid shifts.
Driving Characteristics
The 116 horsepower and 270 Nm (199 lb-ft) of torque produced by the Cooper D 1.5 Automatic provided adequate performance for everyday driving. Acceleration from 0 to 60 mph took around 9 seconds, and the top speed was 125.5 mph. While not a performance-oriented variant, the engine delivered a usable amount of power, particularly in the mid-range, making it suitable for both city and highway driving. The automatic transmission, while smooth, could feel somewhat sluggish compared to the manual gearbox options. Gear ratios were optimized for fuel efficiency, meaning the engine didn’t always feel as responsive as it could be. The 5-door configuration added some weight compared to the 3-door model, slightly impacting acceleration and handling.
Equipment & Trim Levels
The Cooper D 1.5 Automatic typically came equipped with a respectable level of standard features. These included air conditioning, power windows, power mirrors, a multi-function steering wheel, and a basic audio system. Interior upholstery was typically cloth, with options for leather upgrades. Dashboard trim could be customized with various finishes. Common optional extras included a navigation system, parking sensors, automatic headlights and wipers, and a panoramic sunroof. The ‘Pepper’ package, a popular option, added styling enhancements such as chrome exterior trim and upgraded interior materials. Safety features included ABS, electronic stability control, and multiple airbags.
Chassis & Braking
The F55 Mini Hatch 5-door utilized a McPherson strut front suspension and a multi-link rear suspension, providing a good balance between ride comfort and handling precision. The suspension was tuned to be slightly softer than the 3-door model to accommodate the increased weight and provide a more comfortable ride. Front brakes were ventilated discs, while rear brakes were solid discs. ABS (Anti-lock Braking System) was standard. Stabilizer bars were fitted front and rear to reduce body roll during cornering. The steering system employed an electric power steering system, offering precise and responsive control.
Market Reception & Comparison
The Cooper D 1.5 Automatic received generally positive reviews from automotive critics. It was praised for its fuel efficiency, comfortable ride, and stylish design. However, some reviewers noted that the automatic transmission could feel a bit slow and that the engine lacked the outright performance of the Cooper S models. Compared to the 1.5-liter petrol Cooper, the diesel variant offered significantly better fuel economy but less overall power. The manual transmission version of the Cooper D was often preferred by driving enthusiasts for its more engaging driving experience. Reliability was generally good, although some owners reported issues with the diesel particulate filter (DPF) system, a common concern with modern diesel engines.
Legacy
The Mini Hatch (F55) 5-door Cooper D 1.5 Automatic remains a popular choice in the used car market. Its fuel efficiency, practicality, and distinctive styling continue to appeal to buyers. The B37C15A engine, while not without its potential issues (such as DPF regeneration problems), has proven to be relatively durable when properly maintained. Regular servicing, including oil changes and DPF cleaning, is crucial for long-term reliability. The combination of a Mini’s iconic design with the practicality of a 5-door hatchback and the economy of a diesel engine ensures that this variant will remain a sought-after model for years to come.
