Well a lot of people say these thing go from 20-25MPH with full upgrades....so if it goes lets say 23 MPH and its 1/28 scale, then we assume that the speed it also 1/28 scale so if you mulitply the speed times 28(because it is 1/28 scale) then you get the scale speed....so if this car were the size of a real car it would go......644MPH!!!!!!!!!!!!!!!!!