The Mini Convertible (R52) Cooper S 1.6i 16V Automatic, produced from January 2005 to August 2008, represented a compelling blend of performance and open-air motoring within the first generation of modern Mini convertibles. Built on the BMW/Rover 1HX0/A3 platform, this variant occupied a mid-range position in the R52 lineup, offering a step up in power and features from the base Cooper models while remaining more accessible than the later John Cooper Works (JCW) versions. It aimed to deliver a sporty driving experience with the convenience of an automatic transmission, appealing to buyers seeking a fun and stylish convertible.
Technical Specifications
| Brand | Mini |
| Model | Convertible |
| Generation | Convertible (R52) |
| Type (Engine) | Cooper S 1.6i 16V (170 Hp) Automatic |
| Start of production | January, 2005 |
| End of production | August, 2008 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 13.1 l/100 km (18 US mpg, 21.6 UK mpg, 7.6 km/l) |
| Fuel consumption (extra urban) | 6.9 l/100 km (34.1 US mpg, 40.9 UK mpg, 14.5 km/l) |
| Fuel consumption (combined) | 9.2 l/100 km (25.6 US mpg, 30.7 UK mpg, 10.9 km/l) |
| CO2 emissions | 221 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.9 sec |
| Acceleration 0 – 62 mph | 7.9 sec |
| Acceleration 0 – 60 mph | 7.5 sec |
| Maximum speed | 215 km/h (133.59 mph) |
| Weight-to-power ratio | 7.9 kg/Hp, 127.3 Hp/tonne |
| Weight-to-torque ratio | 6.1 kg/Nm, 164.8 Nm/tonne |
| Power | 170 Hp @ 6000 rpm |
| Power per litre | 106.4 Hp/l |
| Torque | 220 Nm @ 4000 rpm (162.26 lb.-ft. @ 4000 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | W11B16A |
| 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 | 8.3:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Supercharger, Intercooler |
| Valvetrain | SOHC |
| 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 | 1335 kg (2943.17 lbs.) |
| Trunk (boot) space – minimum | 120 l (4.24 cu. ft.) |
| Trunk (boot) space – maximum | 605 l (21.37 cu. ft.) |
| Fuel tank capacity | 50 l (13.21 US gal | 11 UK gal) |
| Length | 3655 mm (143.9 in.) |
| Width | 1688 mm (66.46 in.) |
| Width including mirrors | 1955 mm (76.97 in.) |
| Height | 1415 mm (55.71 in.) |
| Wheelbase | 2467 mm (97.13 in.) |
| Front track | 1460 mm (57.48 in.) |
| Rear (Back) track | 1454 mm (57.24 in.) |
| Front overhang | 647 mm (25.47 in.) |
| Rear overhang | 541 mm (21.3 in.) |
| 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 | Trailing arm |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
INTRODUCTION
The R52 Mini Convertible Cooper S Automatic, launched in 2005, brought a more potent and refined experience to the Mini convertible range. It built upon the retro-inspired design of the R50/R53 hardtop, offering open-top driving with a focus on style and a sporty character. The “S” designation indicated a significant performance upgrade over the standard Cooper, thanks to the supercharged 1.6-liter engine. The automatic transmission option, while not as common as the manual, provided a more accessible driving experience for a wider range of drivers, particularly in urban environments.
Powertrain & Engine Architecture
At the heart of the Cooper S Automatic lies the W11B16A engine, a 1.6-liter inline-four cylinder powerplant. This engine is notable for its Eaton supercharger, which provides instant boost and a characteristic whine. The supercharger, coupled with an intercooler, significantly increases power output compared to naturally aspirated versions. Fuel delivery is managed by a multi-port fuel injection system. The engine utilizes a single overhead camshaft (SOHC) valvetrain. The automatic transmission is a six-speed unit, designed to provide smooth shifts and efficient power delivery. This transmission was specifically tuned to handle the increased torque output of the supercharged engine. The engine code, W11B16A, is crucial for identifying specific parts and maintenance requirements.
Driving Characteristics
The Cooper S Automatic offered a noticeably more engaging driving experience than the base Cooper. While the automatic transmission slightly dulled the immediacy of the manual gearbox, it still delivered brisk acceleration. The 0-60 mph time of around 7.5 seconds was respectable for its class. The supercharger provided strong low-end torque, making it easy to navigate city streets and overtake on the highway. The automatic transmission’s gear ratios were optimized for both performance and fuel economy, though the combined fuel economy of around 25.6 US mpg was not exceptional. Compared to the manual transmission version, the automatic offered a more relaxed driving experience, but some enthusiasts felt it sacrificed a degree of driver involvement.
Equipment & Trim Levels
The Cooper S Automatic came standard with a generous array of features, including air conditioning, power windows and locks, and a premium sound system. Interior upholstery typically consisted of cloth or leatherette, with options for full leather upgrades. The dashboard featured the signature Mini center-mounted speedometer, and chrome accents were prevalent throughout the cabin. Optional extras included a panoramic sunroof, heated seats, and a navigation system. The Cooper S trim also included sport seats, a sport suspension, and unique exterior styling cues, such as a more aggressive front bumper and rear spoiler.
Chassis & Braking
The R52 Cooper S Automatic utilized a McPherson strut front suspension and a trailing arm rear suspension. This setup provided a good balance of handling and ride comfort. The front brakes were ventilated discs, while the rear brakes were solid discs, providing adequate stopping power. Anti-lock braking system (ABS) was standard. The chassis was reinforced compared to the standard Cooper to handle the increased power and torque. Stabilizer bars were fitted front and rear to reduce body roll during cornering.
Market Reception & Comparison
The Mini Convertible Cooper S Automatic was generally well-received by automotive critics. It was praised for its stylish design, fun-to-drive character, and comfortable interior. However, some reviewers noted that the automatic transmission diminished the sporty feel of the car compared to the manual version. Fuel economy was also a point of criticism, as it was not as competitive as some other vehicles in its class. Compared to the standard Cooper Automatic, the Cooper S offered a significant performance upgrade, justifying its higher price tag. The JCW Convertible, launched later, provided even more performance, but at a considerably higher cost.
Legacy
The R52 Mini Convertible Cooper S Automatic has proven to be a relatively reliable vehicle, although some common issues have emerged over time. These include occasional supercharger pulley failures and oil leaks. The automatic transmission, when properly maintained, has generally proven durable. Today, the R52 Cooper S Automatic remains a popular choice in the used car market, appealing to buyers seeking a stylish and fun-to-drive convertible. Its retro design and engaging driving experience continue to make it a desirable classic for Mini enthusiasts.
