Quote:
Originally Posted by chonko
Drive train losses are not a fixed percentage, but rather fixed number.
Parasitic Torque losses= Friction coefficient X Rotating Mass X Radius.
Frictional coefficient is higher at lower RPM, and does change with RPM.
By using lighter materials in the transmission, you can reduce the drivetrain losses.
Audi has higher losses because the rotating mass (Quattro drive train) is more than the that o RWD system.

For one you are contradicting yourself here, you say the loss is a fixed number, which is false, then you say in the formula is it a function of rpm, which is correct. Your formula may have some correct features but is wrong as well, a simple check of the units will tell you that (watts is
not equal to mass x distance). An AWD has more losses becuase of the number of lossy interfaces, gear interfaces and bearings, etc, as well as the larger rotating mass involved.