Available in base two door Convertible and two door Convertible S configurations, the 2006 MINI Cooper Convertible is a compact four seater with plenty of curb appeal for enthusiasts and non-enthusiasts alike. With the S getting a 168 horsepower 1.6-liter 4-cylinder. The Cooper Convertible boasts EPA ratings in the 27 City/35 Highway range. Luxury amenities include auto climate control, navigation, a trip computer and AM/FM/CD audio.