A sloppy mess you might want to walk around.
Aside from the extremely stupid story aspect you have a career mode which you can race in many different racing styles which may lead you to believe there is variety in this game, and you'd be wrong. The driving of each car differs greatly but the fact that they're all hard to control doesn't. AI doesn't make this task any more fun with the ability to knock you off track and seemingly drive around turns with ease no matter how impossible it may be for you. AI drives in a very cartoonish manner taking turns in an L shape without loosing speed.
There are however cars to unlock for Free racing and mulitplayer races, sadly you need to compete in the Career mode to unlock more cars to enjoy on your downtime. If you're looking for a racing sim this isn't it, fun arcade racer again the answer would be nil.