Bruce Brown wrote:
carringb wrote:
HP is what matters.
I could not disagree more, TORQUE is what matters.
Having said that, I think in the rest of your post you were actually saying that.
HP sells stuff, torque gets the job done.
Torque is only a measurement of force. Horsepower tells you how fast that torque can get work done. Torque can be increased nearly infinitely by gearing. If you have two 300 horsepower engines, one with 250 ft-lbs of torque, the other with 500 ft-lbs of torque, they will both climb the same hill at the same speed, only the engine with 250 ft-lbs will be turning 5,000 RPM, while the engine with 500 ft-lbs will only need to turn at 2500 RPM.
If we want to get more detailed, its actually "area under the curve" that matters. An engine with more torque tends to have a flatter torque curve, which also results in flatter horsepower curve, making it available more often. But that does not mean a lower torque engine cannot also have a flat torque curve.