The first answer is Street Racer.
There are however many other great racing games for the Genesis, that have a more realistic perspective: Top Gear 2, Lotus 2 RECS, Outrun series, Road Rash 1 & 2, Super Hang-on, etc. etc.
Enjoy
- Alex
PS: I forgot to add that all the mentioned games run fullspeed with sound at FS1, at the default DrMD setting of 144Mhz.