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 hatchback of the Hardtop Mini, replacing it with a drop down ‘tailgate’ that is reminiscent of the classic Mini it incorporates similarly prominent external hinges, and with the roof in the closed position, the rear roof section and luggage shelf can be raised with two handles, semi-tailgate style, to access the luggage space easier. The convertible also adds two small power windows for the rear seat passengers which are lowered automatically when the roof opens. The roof is made from a heavy cloth, with many layers of insulation; the rear window is glass with an integral heater/defroster, but no washer or wiper.
At the 2007 North American International Auto Show, Mini introduced the limited edition Mini Cooper S Sidewalk Convertible. It had a top speed of 215 km/h (134 mph) and accelerates from 0 to 100 kilometres per hour (0 to 62 mph) in 7.9 seconds. The engine provides 168 hp (125 kW) and 220 N·m (160 ft·lbf) of torque.