I think it would be neat to have my Smart car sound like it has a V8 engine in it. ;D
http://www.gizmag.com/soundracer-v8-video-review/14019/ (http://www.gizmag.com/soundracer-v8-video-review/14019/)
(http://www.gizmag.com/pictures/hero/soundracer-v8.jpg)
::)
That is kind of awesome actually.
I feel like that would get you in trouble though. You'd want to go faster and faster all the time.