I don't know, but you can't really tell just by looking. It's all in the details. There are some pretty boxy looking cars with great aerodynamics. Some Volvos, Audis, etc. I don't think the new Mustang could possibly be worse than the current one, because the current one is terrible. I don't remember the specific numbers, but a 2004 is not much better than my 1986, if at all!