The 2015 Mazda MX-5 Miata is available as a 2-door, 2-seat convertible. Starting at $23,970, the 2015 Mazda MX-5 Miata Sport (M5) Convertible is powered by a 2.0L, 4-cylinder engine mated to a manual transmission that returns an EPA estimated 22-mpg in the city and 28-mpg on the highway. The top of the line 2015 Mazda MX-5 Miata 25th Anniversary Edition Touring (A6) Power Retrac, priced at $32,655, is powered by a 2.0L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 28-mpg on the highway.