valhalla360 wrote:
jdc1 wrote:
Torque is what counts when hauling a load.
Torque (at the wheels including overall gear ratio) determines if you will get up the hill.
HP determines how fast you will get up the hill.
They are related as HP = Torque X RPM
To the original question, yes, I think things are maxing out. Not because it's technologically impossible to build a 700-1000hp engine but because in 95% of conditions, you can travel at any speed you choose with a 400hp motor (with associated fuel consumption increase of course).
400 HP is a little bit skimpy for larger RV's. You need over 500 HP to pull a large RV (20,000 lb fiver) up a 6% grade at 65 mph. I haven't been in the mountains with my 2021 Ford but my 2017 with 440 HP pulled down to about 50 mph on some hills with a 17k lb trailer in tow.