The off-road mills produce more torque than their on-road counterparts? Seems rather backwards to me, on-road vehicles have a ton more traction and could put the power to the ground much better than an off-road vehicle. They typically have tighter turns that could benefit from more torque as well. I've only seen a couple 1/8 on-road tracks but both had a single long back straight with a front straight approximately 1/2 the length of the back so it wouldnt seem top end HP would be the main focus.