HomeAll RepliesRe: Size differences betwee different car classes Re: Size differences betwee different car classes Sponsored October 22, 2012 at 5:23 pm #40711 MainwayneParticipant I agree the EPA doesn’t have a clue( what government agency does). Under their guide line the Regal is a midsize Regal with E assist is a compact . It is interesting that the Bentley Contintal GT is a 616 HP subcompact. Sponsored Subscribe to GM Authority For around-the-clock GM news coverage We'll send you one email per day with the latest GM news. It's totally free. First Name Last Name Email Address Subscribe via Email Leave this field empty if you're human: Sponsored