v10 torque vrs diesel

427435 wrote:

uncleluap wrote:

ed1 wrote:
As an engineer (retired) I'm always amused by the arguments over diesel vs gas torque. The interesting part is that your diesel, generating 800 ft lbs at 1500 RPM, is exactly equivalent to your gasser generating 400 ft lbs at 3000 RPM. Why? Because both engines drive the same size wheels but at different engine speeds, so the gasser has a final gear ratio which is 2X that of the diesel. Guess what the 2:1 gear ratio does?- it multiplies the gasser's engine torque by a factor of 2. So, at the rear wheels, both engines provide the SAME torque.
now to be fair, the diesel is humming in the rear of the coach, while the gas engine is roaring under your feet.

This discussion always reminds me of the specifications for the M1A1 Abrams tank. 135,000 lbs, top speed of 60 mph, able to climb 45% slopes! And all with 270 ft lbs of torque!

How do they do that? They generate the torque at 30,000 RPM, then feed it into a 10:1 reduction gear. So then you've got 2700 ft lbs and 1500 HP at 3000 RPM.

I seriously doubt you are correct on your figures however your never going to see a ford V10 in 40ft 4 slide pusher style Motorhome
The reason being is a V10 ford gas engine does not produce enough torque at any RPM to move 36K+ up hills etc at any where near accepted level,s of speeds and reliability

Again, it's not the torque but the hp (and enough gears) that actually move a MH uphill.

The reason you don't see gassers in bigger MH's is that the people with the money for a 40' MH are also willing to pay the money for an air-ride suspension system and to have the engine/transmission in the back (quieter).

What you said is simply wrong about torque and HP. Anyone reading this should just apply real life logic and fact to understand why ALL bigger rigs have diesel motors with much higher torque. They can handle heavier loads and move them up hills better because of their higher torque.