The Mini Convertible (R52) One 1.6i, producing 90 horsepower, was a key entry point into the second-generation Mini Convertible range, produced from 2007 to August 2008. Positioned as the base model, it offered the open-air experience of the R52 platform at a more accessible price point than its Cooper and Cooper S siblings. This variant played a significant role in broadening the appeal of the new Mini Convertible, attracting buyers who prioritized style and affordability over outright performance. It was built on the BMW Group’s 1HX0/A3 platform, shared with the Mini Hatchback.
Technical Specifications
| Brand | Mini |
| Model | Convertible |
| Generation | Convertible (R52) |
| Type (Engine) | One 1.6i (90 Hp) |
| Start of production | 2007 |
| End of production | August, 2008 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 10 l/100 km (23.5 US mpg, 28.2 UK mpg, 10 km/l) |
| Fuel consumption (extra urban) | 5.7 l/100 km (41.3 US mpg, 49.6 UK mpg, 17.5 km/l) |
| Fuel consumption (combined) | 7.2 l/100 km (32.7 US mpg, 39.2 UK mpg, 13.9 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 13.5 sec |
| Acceleration 0 – 62 mph | 13.5 sec |
| Acceleration 0 – 60 mph | 12.8 sec |
| Maximum speed | 175 km/h (108.74 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 13.8 kg/Hp, 72.6 Hp/tonne |
| Weight-to-torque ratio | 8.9 kg/Nm, 112.9 Nm/tonne |
| Power | 90 Hp @ 5500 rpm |
| Power per litre | 56.3 Hp/l |
| Torque | 140 Nm @ 3000 rpm (103.26 lb.-ft. @ 3000 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | W10B16A |
| 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 | 10:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHC |
| Engine oil capacity | 4.5 l (4.76 US qt | 3.96 UK qt) |
| Coolant | 5.3 l (5.6 US qt | 4.66 UK qt) |
| Kerb Weight | 1240 kg (2733.73 lbs.) |
| Max. weight | 1565 kg (3450.23 lbs.) |
| Max load | 325 kg (716.5 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 | 3635 mm (143.11 in.) |
| Width | 1688 mm (66.46 in.) |
| Height | 1415 mm (55.71 in.) |
| Wheelbase | 2467 mm (97.13 in.) |
| Front track | 1458 mm (57.4 in.) |
| Rear (Back) track | 1466 mm (57.72 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 | 5 gears, manual transmission |
| Front suspension | Coil spring |
| Rear suspension | Coil spring |
| 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 Mini Convertible (R52) One 1.6i, launched in 2007, represented the entry-level offering in the second-generation Mini Convertible lineup. Building upon the success of the R50/R53 first-generation models, the R52 brought a more refined and spacious interior, along with updated styling and technology. The “One” designation signified its position as the most affordable variant, aimed at buyers seeking the iconic Mini aesthetic and open-top driving experience without the higher price tag of the Cooper or Cooper S models. This model was primarily sold in the European market, where smaller, fuel-efficient convertibles were highly popular.
Powertrain & Engine Architecture
At the heart of the One 1.6i was the W10B16A engine, a 1.6-liter naturally aspirated inline-four cylinder. This engine was part of the BMW N-series engine family, known for its reliability and relatively simple design. The W10B16A featured a single overhead camshaft (OHC) valvetrain with four valves per cylinder, and utilized multi-port fuel injection. The engine produced 90 horsepower at 5500 rpm and 140 Nm (103.26 lb-ft) of torque at 3000 rpm. The engine was transversely mounted in the front of the vehicle. The standard transmission was a 5-speed manual gearbox, although a 6-speed automatic transmission was also available as an option. The automatic transmission, while offering convenience, did slightly impact acceleration and fuel economy compared to the manual version.
Driving Characteristics
The 90 hp output of the One 1.6i resulted in a relaxed and comfortable driving experience, rather than an overtly sporty one. Acceleration from 0-60 mph took around 12.8 seconds, and the top speed was 175 km/h (108.74 mph). The engine’s torque delivery was relatively flat, providing adequate power for everyday driving situations. The 5-speed manual transmission offered precise shifts, while the optional automatic transmission provided smooth gear changes. Compared to the more powerful Cooper and Cooper S models, the One 1.6i felt noticeably slower, particularly during overtaking maneuvers. However, its lighter weight and less stressed engine contributed to improved fuel economy.
Equipment & Trim Levels
The One 1.6i Convertible came standard with features such as air conditioning, power windows, central locking, and an audio system. Safety features included ABS brakes and front airbags. Interior upholstery was typically cloth, with a choice of color schemes. Optional extras included leather upholstery, a sunroof, alloy wheels, and a premium sound system. The dashboard layout was characteristic of the R52 Mini, featuring a large central speedometer and a smaller fuel/temperature gauge. Chrome accents and retro-inspired design elements contributed to the car’s distinctive interior styling.
Chassis & Braking
The R52 Mini Convertible utilized a MacPherson strut front suspension and a multi-link rear suspension, providing a comfortable and controlled ride. The front brakes were ventilated discs, while the rear brakes were solid discs. The steering was a hydraulic power-assisted rack and pinion system, offering precise and responsive handling. The chassis was reinforced to compensate for the lack of a fixed roof, ensuring adequate torsional rigidity. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering.
Market Reception & Comparison
The Mini Convertible One 1.6i was generally well-received by automotive critics as an affordable and stylish entry into the convertible market. However, some reviewers noted its relatively modest performance compared to its Cooper and Cooper S siblings. Fuel economy was praised, with combined figures around 32.7 US mpg. In terms of reliability, the W10B16A engine proved to be generally dependable, although regular maintenance was essential. Compared to the Cooper, the One offered a lower purchase price but sacrificed performance. The Cooper S provided a significant performance upgrade but came at a considerably higher cost. The One 1.6i appealed to buyers who prioritized style, fuel efficiency, and affordability over outright speed.
Legacy
The Mini Convertible (R52) One 1.6i remains a popular choice in the used car market, particularly among buyers seeking a stylish and affordable convertible. The W10B16A engine is known for its reliability, although regular maintenance, including oil changes and timing chain inspections, is crucial. Parts availability is generally good, thanks to the Mini’s widespread popularity. While not the fastest or most feature-rich variant, the One 1.6i offers a unique blend of style, affordability, and open-top driving enjoyment, making it a desirable classic for many Mini enthusiasts.
