My 89 7M smells like a regular car when it's being driven like a regular car... but smells slightly like exhaust gases at WOT for prolonged periods of time. Crack a window for a minute or two, and voila, car smells like a regular car again!
If it's not raining, I drive with the windows down anyway, to get a good front row seat for the I6 Turbo Soundtrack. If it's sunny and warm, targa's out and windows are down. So it smells like warm sunny breeze and blue skies, with 90km of headroom.
I'll feel better when it smells like race fuel and NOS.