Originally Posted by 09 harley
This is the craziest thing I have read in a long time. A diesel and a gas engine with the same horsepower will perform the same. Absolutely incorrect. Need to go back to engineering 101 and spend some time leaning how horsepower is determined. It is basically a calculation based on.... I'll let you learn the answer. Torque is easily determined and it is this property that enables diesels to pull heavier loads compared to gas engines. Enough with his both engines are the same nonsense.
After your study I'm sure you will have a basic understanding of why the engines are different and why each is more useful for certain tasks.
Why on earth would there be two two styles of engines unless they each had a role to play?
Sorry, but you are absolutely, totally, unequivocally, 100% wrong. And I don't have to "learn the answer" about how HP is determined. I know exactly how horsepower is determined, thank you very much. Torque x RPM /5252. I've done the calculations on engine builds hundreds of times. Note the "RPM" portion of that forumula. You have evidently forgotten about that little piece of the puzzle.
A 360 HP diesel in a 25,000 pound coach will go up a hill at the same maximum speed as a 360 HP gas coach of the same weight. The difference? The diesel will do it at 2,000 RPM but you have to wind up that gas engine to 4,500 RPM to get all 360 HP out of it. That's where the "RPM" portion of the formula comes into play, in case you missed it.
According to your assertion, there is a difference between "diesel horsepower" and "gasoline horsepower." What about "turbine horsepower" or "electric motor horsepower." Are they all different, too? Now THAT is really crazy.
Talk about nonsense...