Topspeed modifier

[Kubby]

And then it's checked against Terminal Velocity of the body: Drag * Area * 1.1644 * Engine Torque

There is something wrong with this formula. I mean, does really Terminal Velocity of the body increase with drag or area? Common sense tells me it is somewhat wrong.

I think MaxSpeed and TerminalVelocity could get merged into one MaxSpeed value:

V = (P/(Cx*0,6461*A))^(1/3), where

V is MaxSpeed (in meters per second)
P is power after applying drivetrain losses (in watts)
Cx is drag coefficient
A is area (in square meters)

Formula does not take the rolling resistance of the wheels into account (as it is somewhat more difficult to take both of them into account), but it should be close enough, as tested on my own car values.