Two vehicles, same engine, torque, gear ratios, wheel size, weight, etc, etc but one is significantly slower.

[Mark]

I'm comparing Audi 80 Quattro version with a n/b I made.
They have the same:
- globals
- weight
- engine (revs, torque, rpms, diff, gears, etc)
- engoption
- torquecurve
- wheel diameter

The quattro does 100+ mph easily
My vehicle barely does 35 in 3rd gear (in 3rd gear) and has 0 power in 4th/5th gear.

If I give it a stupid amount of torque it will wheelspin at 200mph but it still can't go faster than 50mph. Why?

Why is this? what am I doing wrong?

 

[Austin]

Fusedrag?

 

[Mark]

Aw what! I thought that was an airplanes-only thing

But yes that was what the problem was, thanks!