2012 DTM champion Bruno Spengler and 1989 DTM champion Roberto Ravaglia drove each other's championship winning M3's around the Hockenheimring the other day. Bruno got about a 20 second head start in Ravaglia's E30 and got passed entering the arena section. This video is mostly just driving, the one after the jump has the two champs talking.

There's some pictures of the event here.

DTM Seat SwapS