The 2021 MINI Convertible is available as a 2-door, 4-seat convertible. Starting at $27,400, the 2021 MINI Convertible (M6) is powered by a 1.5L, 3-cylinder engine mated to a manual transmission that returns an EPA estimated 26-mpg in the city and 37-mpg on the highway. The top of the line 2021 MINI Convertible John Works (A8), priced at $38,400, is powered by a 2.0L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 25-mpg in the city and 33-mpg on the highway.