I don't know if everyone is suggesting the BMW 335 coupe, but they are making the 335 four-door as well. I never see press coverage on the 335 four-door yet when I went to a dealership I saw a 335 four-door. I've always thought that engine was only offered in the coupe. With slight modifications, such as from I believe Vishnu tuning, it can make 335 rwhp, which translates to M3-beating straight line performance ($3,000)!