There is an equation to figure out HP. I know weight/ gvwr is involved in the equation. In 99 the base Cummins engine was 175 Hp/400 tq. I upped mine to 215 Hp /520 tq my Mule(Dodge) is 215 hp/440 tq. My Mule's pump would not produce the same hp/tq in the Freightliner because of the weight/GVWR it would be a lot less.