[coolhandcountry]

The buggy diffs by hb are 3.31 ratio.
The truggy diffs by hb are 4.3 ratio.
The weight of the car and how many cells depends on how fast you can go as well. The quality of batteries. You also have to figure in the amount of drag and stuff different buggies and trucks or even cars have. 70 MPH in a mt is harder to do than a street car.