The Mitsubishi Lancer Evolution, colloquially known as the Evo, is a car manufacture by Mitsubishi Motors. There have been ten versions to date, and the numerical designation of the model is most commonly a roman numeral. All of them share a two litre, turbocharged engine and four-wheel drive system. Evolution models prior to version V were the officially-approved models for Mitsubishi's efforts in the World Rally Championship's Group A class and SCCA ProRally Championship. In order to follow these rules, the Evolution is based on the same platform as the Lancer. However, it is much more powerful than the standard Lancer, with the unibody being the only major part in common between the two.