The Mini Convertible (R57) Cooper S 1.6, produced from August 2009 to February 2010, represented a performance-oriented variant within the second generation (R57) Mini Convertible lineup. Positioned as a step up from the base Cooper models, the Cooper S offered a significant increase in power and a more sporting driving experience. This particular iteration, equipped with the 175 horsepower 1.6-liter turbocharged engine and a six-speed manual transmission, aimed to deliver an engaging open-top driving experience while maintaining the Mini’s characteristic style and practicality. It was a key model in attracting buyers seeking a premium small convertible with a focus on fun-to-drive dynamics.
Technical Specifications
| Brand | Mini |
| Model | Convertible |
| Generation | Convertible (R57) |
| Type (Engine) | Cooper S 1.6 (175 Hp) |
| Start of production | August, 2009 |
| End of production | February, 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 7.5 l/100 km (31.4 US mpg) |
| Fuel consumption (extra urban) | 5.1 l/100 km (46.1 US mpg) |
| Fuel consumption (combined) | 6 l/100 km (39.2 US mpg) |
| CO2 emissions | 139 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.3 sec |
| Acceleration 0 – 62 mph | 7.3 sec |
| Acceleration 0 – 60 mph | 6.9 sec |
| Maximum speed | 225 km/h (139.81 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 7 kg/Hp |
| Weight-to-torque ratio | 4.7 kg/Nm |
| Power | 175 Hp @ 5500 rpm |
| Torque | 260 Nm @ 1600-5000 rpm (191.77 lb.-ft.) |
| Engine layout | Front, Transverse |
| Engine Model/Code | N14B16A |
| 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 | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 4.2 l (4.44 US qt | 3.7 UK qt) |
| Coolant | 5.2 l (5.49 US qt | 4.58 UK qt) |
| Kerb Weight | 1230 kg (2711.69 lbs.) |
| Max. weight | 1660 kg (3659.67 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 | 50 l (13.21 US gal | 11 UK gal) |
| Length | 3714 mm (146.22 in.) |
| Width | 1683 mm (66.26 in.) |
| Height | 1414 mm (55.67 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) | 130 mm (5.12 in.) |
| Minimum turning circle | 10.7 m (35.1 ft.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears | 6 gears, manual transmission |
| Front suspension | Independent, type 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 | 195/55 R16 87V RSC |
| Wheel rims size | 6.5J x 16 LM |
Powertrain & Engine Architecture
The heart of the Cooper S 1.6 was the N14B16A engine, a 1.6-liter inline-four cylinder powerplant. This engine was a significant upgrade over the naturally aspirated engines found in the standard Cooper models. It featured a twin-scroll turbocharger with an intercooler, direct fuel injection, and variable valve timing (Double-VANOS) on both the intake and exhaust camshafts. The direct injection system allowed for precise fuel delivery, improving efficiency and reducing emissions. The N14 engine was known for its responsiveness and willingness to rev, delivering a peak output of 175 horsepower at 5500 rpm and 192 lb-ft of torque between 1600 and 5000 rpm. The six-speed manual transmission offered precise shifts and contributed to the car’s sporty character. The transmission’s gear ratios were tuned to maximize acceleration and provide a balanced driving experience.
Driving Characteristics
The Cooper S 1.6 offered a noticeably more engaging driving experience than the base Cooper. The turbocharger provided a surge of power in the mid-range, making overtaking and accelerating out of corners effortless. While not a track weapon, the Cooper S was quick and nimble, with a 0-60 mph time of around 6.9 seconds. The manual transmission allowed for full control over the engine’s power, and the short throw shifter provided a satisfying tactile feel. Compared to the automatic transmission option, the manual version offered better fuel economy and a more direct connection to the driving experience. The suspension, while firm enough to provide good handling, was still compliant enough to absorb bumps and provide a comfortable ride. The front-wheel-drive layout could exhibit some torque steer under hard acceleration, but this was generally considered part of the car’s character.
Equipment & Trim Levels
The Cooper S 1.6 came standard with a generous amount of equipment, including air conditioning, power windows and locks, a multi-function steering wheel, and a premium sound system. Sport seats provided good support during spirited driving. Exterior features included unique styling cues such as a sportier front bumper, side skirts, and a rear spoiler. Optional extras included leather upholstery, a sunroof, navigation system, and upgraded wheels. The interior trim was typically finished with aluminum accents, adding to the car’s premium feel. The convertible top was a fully automatic fabric roof that could be lowered or raised in a matter of seconds.
Chassis & Braking
The R57 Cooper S 1.6 utilized a McPherson strut front suspension and a semi-independent rear suspension. This setup provided a good balance between handling and ride comfort. The front suspension featured a stabilizer bar to reduce body roll during cornering. The braking system consisted of ventilated discs at the front and solid discs at the rear. Anti-lock brakes (ABS) were standard, providing enhanced stopping power and control. The steering was a rack-and-pinion system, offering precise and responsive steering feel.
Market Reception & Comparison
The Mini Convertible Cooper S 1.6 was generally well-received by automotive critics. It was praised for its sporty handling, powerful engine, and stylish design. However, some critics noted that the rear seats were cramped and that the trunk space was limited, especially with the top down. Compared to other small convertibles on the market, such as the Mazda MX-5 Miata, the Cooper S offered a more premium interior and a more refined driving experience, but at a higher price point. The Cooper S also offered a more practical alternative to the Miata, with its four seats and larger trunk. Fuel economy was respectable for a performance-oriented convertible, averaging around 39 mpg in combined driving.
Legacy
The N14 engine, while generally reliable, has been known to experience some issues with the high-pressure fuel pump and timing chain tensioner. Regular maintenance and preventative care are essential to ensure the longevity of this engine. Today, the R57 Cooper S 1.6 remains a popular choice among enthusiasts looking for a fun and stylish open-top car. Well-maintained examples command a reasonable price on the used car market. Its combination of performance, handling, and iconic Mini styling ensures its continued appeal for years to come. The R57 Cooper S 1.6 represents a sweet spot in the Mini lineup, offering a compelling blend of practicality, performance, and personality.
