the silverback wrote:
I am a retired Engineer also and designed engines. You can not argue with the equations above. they work for both gas and diesel,in fact any engine.
Let's keep it simple!! Go to any NASCAR race or drag strip. See that they are talking about weight/HP not torque to make there machines do something faster.
It also works for Motoehomes!!!
IMO nobody here is disputing the horsepower equation, nor the history of its origin.
We recognize that all the manufacturers of both gasoline and diesel engines which are used in motorhomes follow standard procedure with regard to publishing torque and horsepower graphs for their engines.