Which car would win in a race? An 03' 540i or a 05' Mustang GT?

Thanks

Both bone stock and fresh?
Drag race: probably the Mustang, but not by much (13.9 versus 14.1 second 1/4 mile times)
Road course: probably the 540 (assuming equally skilled drivers).
But the 540 is the better car overall.
Just my opinion, having had seat time in both.

Different people has different vision about it .You can compare the tow car in many aspects,the gas mileage,comfortale,power and so on.

Don't know about racing, but I rented a Mustang GT on a business trip just last week.

Zippy, yes, but it really bounces around on a freeway that has "normal" bumps. It did so to a disturbing degree. Maybe just that particular car, though?

But then I (probably unfairly) compare it to my little old 2000 Z3 :-)

well it depends on the people who are driving the cars, but i would say 90% the bmw would win.