A couple racers would be neat, I think.
The #1 racer would be a normal looking racer with the number 1. It's fast and it drifts moderately.
2 person capacity.
The #2 racer boxy looking racer with a roll-cage and the number 2. It's moderately fast and it takes tight turns. 2 person capacity.
The #3 racer would be an F-1 racer (although the front would be shortened so it would be equal length to the other racers) shaped vehicle. It's very fast and takes wide, drifting turn.