The cars available can be basically split up into two categories; electric powered and nitro powered. Electric cars use small electric motors and multiple battery cells (or a battery pack) to power them, while Nitro cars use small nitro engines and special nitro fuel. The electric cars are generally easier to work with in comparison to nitro, but electric can be equally complex when you get into more complex electronics and better equipment.
In both these categories, there are onroad and offroad vehicles available. The offroad vehicles can be used on various terrain, while onroad cars are strictly limited to smooth onroad surfaces.
wikipedia.org dumped 2003-03-17 with terodump