My pops has an M5 and my friend has an M3, both 2001. These two cars are like in the same ratio of automobiles. They handle about the same, and have about the exact 0-60 times. The only real differences are the size, engine type (horspower) and weight. These cars are really nice cars that are just made to well, its scary. I was talking to the guy who sold my dad his M5 at the dealership and he was saying if they made an M3 with a V8 engine and sold it to regular people, what the hell reason is there for an m5, after all that power in a 3 series, you got urself a dream car and no need for anything else.