Give all the same variable such as the batteries, the same motors, same gearing ratios, etc.. the 4wd should be the fastest, followed by the truck then the 2wd. I say that only because of cornering speed.
With the 4wd the front wheels will pull you arround the corner, compared to the 2wd cars.
The truck should be next because they are more stable in the corners because of the wider tires. This means more contact area and they're wider overall as a vehicle.