The Mini Roadster Cooper SD 2.0 Automatic, produced between 2012 and 2015, represented a unique offering within the R59 Mini Roadster range. Positioned as a mid-range variant, it combined a fuel-efficient diesel engine with the convenience of an automatic transmission, appealing to drivers seeking a blend of performance and practicality in a compact, open-top package. This model was part of the broader R59 generation, built on the Mini’s characteristic front-wheel-drive platform and aimed at providing a more engaging driving experience than the standard Mini hatchback, while offering the open-air enjoyment of a roadster.
Technical Specifications
| Brand | Mini |
| Model | Roadster |
| Generation | Roadster (R59) |
| Type (Engine) | Cooper SD 2.0 (143 Hp) Automatic |
| Start of production | 2012 |
| End of production | 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Roadster |
| Seats | 2 |
| Doors | 2 |
| Fuel consumption (urban) | 7.1 l/100 km (33.1 US mpg) |
| Fuel consumption (extra urban) | 4.4 l/100 km (53.5 US mpg) |
| Fuel consumption (combined) | 5.4 l/100 km (43.6 US mpg) |
| CO2 emissions | 143 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 8.3 sec |
| Acceleration 0 – 62 mph | 8.3 sec |
| Acceleration 0 – 60 mph | 7.9 sec |
| Maximum speed | 204 km/h (126.76 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 8.5 kg/Hp |
| Weight-to-torque ratio | 4 kg/Nm |
| Power | 143 Hp @ 4000 rpm |
| Torque | 305 Nm @ 1750-2700 rpm (224.96 lb.-ft.) |
| Engine layout | Front, Transverse |
| Engine Model/Code | N47C20A |
| Engine displacement | 1995 cm3 (121.74 cu. in.) |
| Number of cylinders | 4 |
| 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 | 5.2 l (5.49 US qt | 4.58 UK qt) |
| Coolant | 7 l (7.4 US qt | 6.16 UK qt) |
| Kerb Weight | 1215 kg (2678.62 lbs.) |
| Max. weight | 1505 kg (3317.96 lbs.) |
| Max load | 290 kg (639.34 lbs.) |
| Trunk (boot) space – minimum | 240 l (8.48 cu. ft.) |
| Fuel tank capacity | 40 l (10.57 US gal | 8.8 UK gal) |
| Length | 3734 mm (147.01 in.) |
| Width | 1683 mm (66.26 in.) |
| Height | 1390 mm (54.72 in.) |
| Wheelbase | 2467 mm (97.13 in.) |
| Front track | 1453 mm (57.2 in.) |
| Rear (Back) track | 1461 mm (57.52 in.) |
| Ride height (ground clearance) | 134 mm (5.28 in.) |
| Minimum turning circle | 10.7 m (35.1 ft.) |
| Drive wheel | Front wheel drive |
| Number of gears | 6 |
| Gearbox type | 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 |
| Tires size | 195/55 R16 87V |
| Wheel rims size | 6.5J x 16 |
Powertrain & Engine Architecture
The heart of the Cooper SD 2.0 Automatic is the N47C20A, a 2.0-liter inline-four diesel engine. This engine was a mainstay in several BMW and Mini models during the early 2010s, known for its efficiency and relatively strong torque output. It utilizes a common rail direct injection system, delivering fuel at extremely high pressure for optimized combustion. The N47 engine family was notable for its use of a timing chain, intended to provide a longer service life compared to timing belts. A single turbocharger with an intercooler boosts performance, providing 305 Nm (224.96 lb-ft) of torque between 1750 and 2700 rpm. The engine’s 143 horsepower peak arrives at 4000 rpm. Paired with this engine is a six-speed automatic transmission, offering smooth shifts and convenience, though it wasn’t known for being particularly sporty or quick to respond compared to manual options.
Driving Characteristics
The 143 hp and 305 Nm of torque provided by the Cooper SD 2.0 Automatic resulted in a respectable, if not exhilarating, driving experience. Acceleration from 0 to 60 mph took around 7.9 seconds, making it quicker than the base Cooper Roadster but significantly slower than the more powerful Cooper S models. The automatic transmission, while convenient, did detract somewhat from the engaging driving feel that the Mini Roadster was designed to deliver. Gear ratios were tuned for fuel efficiency and smooth cruising, rather than aggressive acceleration. In real-world driving, the car felt comfortable and capable on both city streets and winding country roads, with ample torque for overtaking maneuvers. However, drivers accustomed to manual transmissions or higher-output engines might find the automatic’s responsiveness lacking.
Equipment & Trim Levels
The Cooper SD 2.0 Automatic typically came equipped with a reasonable level of standard features. These included air conditioning, power windows and mirrors, a multi-function steering wheel, and a basic audio system. Interior upholstery was generally cloth, though leather options were available. Common optional extras included a premium sound system, navigation, heated seats, and various styling packages. The Roadster, in general, offered a relatively minimalist interior design, focusing on functionality and a driver-centric layout. The convertible top was manually operated as standard, with an electric version available as an option.
Chassis & Braking
The R59 Mini Roadster featured a McPherson strut front suspension and a multi-link rear suspension, providing a good balance of ride comfort and handling. The Cooper SD 2.0 Automatic, due to its weight, utilized a slightly firmer suspension setup compared to the base Cooper models. Braking duties were handled by ventilated discs at the front and solid discs at the rear. Anti-lock Braking System (ABS) was standard. The Roadster’s relatively short wheelbase and wide track contributed to its agile handling characteristics. Stabilizer bars were fitted front and rear to reduce body roll during cornering.
Market Reception & Comparison
The Mini Roadster Cooper SD 2.0 Automatic was generally well-received by automotive critics as a practical and efficient option within the Roadster lineup. It offered a good compromise between performance, fuel economy, and convenience. Compared to the petrol-powered Cooper Roadster, the SD offered significantly better fuel economy (around 43.6 US mpg combined) and more torque. However, the Cooper S models provided a more thrilling driving experience with their higher horsepower outputs. Reliability was generally good, although the N47 engine was later found to be susceptible to timing chain issues in some cases. The automatic transmission was considered reliable but not particularly advanced.
Legacy
The Mini Roadster Cooper SD 2.0 Automatic remains a relatively popular choice in the used car market. Its combination of fuel efficiency, practicality, and open-top driving enjoyment continues to appeal to buyers. While the N47 engine’s potential timing chain issues should be considered during a pre-purchase inspection, the engine is generally robust when properly maintained. The R59 Roadster, as a whole, represents a unique chapter in Mini’s history, offering a distinctive and engaging driving experience that sets it apart from the more mainstream hatchback models. The Cooper SD 2.0 Automatic variant, in particular, provides a compelling option for those seeking a fuel-efficient and comfortable roadster.
