I'll try to choose a land transport for everypony. I know, RainbowDash doesn't need it, but that's not the point.
Here is her car - Bugatti Veyron. Fastest serial car in both worlds))Rarity will be next I think.
Veyron Dash - you are here
Rary Martin DB9 [link]
Peel P Shy [link]
Apple Ram [link]