Cant make vehicle stats accurate

When I plug in real vehicle stats into the torque curve, transmission setup, and tire radius the KM/H is never close to what it should be. I’m taking the Forward Speed of the vehicle movement component X 0.036 to get KM/H. Am I missing something? Any Ideas what I should look at?

Double check that you have all values in their expected units. Sometime developers mix match then so it is better do select one and stick with it. E.g. Metric or Imperial. Also check in Settings what is your default engine units set to and that you are not using scaled meshes.