The later "Mk II" MINI (or R56) uses the BMW-PSA 1.4/1.6 Prince 4 cylinder engine. The naturally-aspirated (non-turbo) versions of this engine use a system known as VALVETRONIC to control valves for optimum performance and/or efficiency. This MINI uses a drivetrain architecture based on that of the Peugeot 207 and the second generation Citroën C3. The R56 Cooper S boasts direct injection and a Twin Scroll Turbocharger featuring an Overboost function for added torque. This engine produces 128 kW (175 HP) and 240 N·m (177 ft·lbf) of torque. The Overboost function momentarily increases torque to 260 Nm (192 ft·lbf) The new Cooper D model is available from April 2007, featuring a 1.6 litre, 16-valve turbodiesel engine producing 80 kW (110 HP) and 240 N·m (177 ft·lbf) of torque. This unit also features the Overboost function momentarily increases torque to 260 N·m (192 ft·lbf) Technical innovations include an electrically driven power steering system that avoids taking power directly from the engine, equal length driveshafts to eliminate torque steer, and a sophisticated multi-link rear suspension usually found only on rear wheel drive cars.
The MINI has a 'drive by wire' electronic throttle, electronic brakeforce distribution, cornering brake control, and electronic stability control to improve control and handling in adverse conditions. With the introduction of the R56 MINI, the CVT transmission has been dispensed with altogether, and replaced by an hydraulic automatic transmission unit, similar to that of the previous Cooper S. This gearbox is available throughout the whole range of R56 MINIs, appearing lastly on the Cooper D from 2008. Additionally, steering-wheel mounted paddle-shift is also available.
At the 'Salon International de l'Auto' (Geneva Motor Show in 2004, MINI introduced a cabriolet (convertible) model which was released in the 2005 model year and available in One, Cooper and Cooper S versions. The convertible roof is fully automatic - an unusual feature in such a small car - and can be opened partially to act as a sunroof whilst the car is driving at speed. The convertible model forsakes the rear hatch of the hardtop MINI - replacing it with a drop down 'tailgate' design reminiscent of the classic Mini and incorporating similarly prominent external hinges. The convertible also adds two small power windows for the rear seat passengers which are retracted automatically as the roof opens. The roof is made from a heavy cloth with many layers of insulation; the rear window is of glass and has a heater/defroster but no washer or wiper.
As a joke and undoubtedly as a part of MINI's viral marketing approach, purchasers of the MINI convertible were asked to sign a 'contract' promising that they would drive the car with the roof open at least 90% of the time. MINI also set up a telephone hotline (in the USA: 1-888-DO NOT CLOSE) which one may call to report convertible owners who are driving with the roof up inappropriately. The automated system offers such helpful advice as how to administer a wedgie to the offender.
At the 2007 North American International Auto Show, Mini introduced the limited edition of Mini Cooper S Sidewalk Convertible. It has a top speed of 215 km/h (134 mph). 0-100 km/h only takes 7.9 seconds. It has 168 hp (125 kW) and 220 N·m (162 ft·lbf) of torque.Source: Wikipedia.