Nuts! I thought this might be the case.. Not having the option to up the power on your car for single race just wants to make me buy faster cars... hard to enjoy my Toyota MR-2 at 200HP..
Also.. how can you enjoy racing a Fiat 500 if i can't up the power a little? boooo.
Fiat fans don't get angry. Just nicer knowing you have 'added' something to the car, and power would have to be one of the fun upgrades i suppose.
..At least you can add some more oomph in drift mode.. but still!