DimensionsThe dimensions of the Cooper S coupe and convertible differed slightly from one another. A 2007 Cooper S convertible spanned a length of 143.9 inches, stood 55.5 inches in height and had a width of 66.5 inches. Cooper S coupes ran a bit longer at 145.6 inches with a similar height and width to the convertible. Both the coupe and convertible shared the same wheelbase and ground clearance of 97.1 inches and 5.1 inches, respectively. Convertible models weighed 2,844 lbs. while the coupe weighed in at a slightly lighter 2,668 lbs.
DrivetrainIn 2007, BMW installed two different engines in the Mini Cooper S, depending on the model. The 2007 Cooper S convertible ran on the previous model year's iron-block, aluminum head supercharged 1.6 liter four-cylinder engine. BMW equipped the Cooper S coupe with a 1.6 liter all-aluminum (block and heads) turbocharged engine. Both of these engines utilized a double overhead cam configuration and multi-port fuel injection with four valves per cylinder, for a total of 16 valves. Prospective buyers of either model could purchase the Cooper S with the standard six-speed manual or upgrade to a six-speed automatic transmission.
PerformanceConvertible Cooper S models equipped with BMW's supercharged engine cranked out 168 horsepower at 6,000 revolutions per minute (rpm) and 162 foot-lbs. of torque at 4,000 rpm. The turbocharged coupe generated 172 horsepower at 5,500 rpm and 177 foot-lbs.of torque at 1,600 rpm. Inside each cylinder, the convertible's engine achieved a compression ratio of 8.3:1 while the coupe's turbocharged engine had a rating of 10.5:1. In fuel economy, the 2007 Cooper S convertibles earned an Environmental Protection Agency 25 miles per gallon (mpg) during city driving and 32 mpg on the highway while the more fuel-efficient coupe rated 29 mpg in the city and 36 mpg on the highway.
The RS sports cars website reported that a 2007 Cooper S convertible equipped with a manual transmission could accelerate from 0 to 60 mph in 7.0 seconds and reach a top speed of 134 mph. A supercharged Cooper S coupe could go from 0 to 60 mph in 6.7 seconds with a top speed of 139 mph.