If you will tune any car it would be sports=). But if you have questions about your car you may check its history (and other information) by VIN faxvin.com/vin-decoder/bmw (for example). As for Pontiac g5 it is a pseudo-sports car but it looks nice as for me.
Probably you should study harder, you will have a chance to go to univercity where you could find new people. It's difficuld but footnotes in the diary probably help you. Anyway your future in your hands.