The Lancer Evolution is Mitsubishi's flagship sports car. Based only on the unibody of the domesticated Lancer sedan, the Evo is a rally-inspired, turbocharged, all wheel drive automobile. The number designation of the model is most commonly a roman numeral. 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 Pro Rally 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.