The 2012 MINI Cooper is available as a 2-door, 4-seat hatchback. Starting at $24,950, the 2012 MINI Cooper Convertible is powered by a 1.6L, 4-cylinder engine mated to a manual transmission that returns an EPA estimated 27-mpg in the city and 35-mpg on the highway. The top of the line 2012 MINI Cooper Roadster, priced at $24,350, is powered by a 1.6L, 4-cylinder engine mated to a manual transmission that returns an EPA estimated 27-mpg in the city and 35-mpg on the highway.