Get a shaft drive tourer for playing on the road. THe shaft provides a sesaled drive train so you don't get it full of gunk, and will also help if you're laying down major power. Something like a Tamiya TB03 or older Associated TC4 if you can find one.
A pan car will be shite unless it's smooth clean asphalt. They don't like bumps, but are super fast. You'd need osmething like a prepared track or airport runway for serious runs with a pan car