4wd slotFor the rest of us mortals (!) the Slot.It belt driven 4WD is a good compromise. It's available on the Audi R18 and there are also compatible chassis for the Scalextric short wheelbase Quattro and the Delta S4 available through4WD cars are much more difficult to setup, but when setup rht on a medium grip track they can be very tough to beat. Four wheel drive implies lockup foreaft and side to side