Quote Originally Posted by typhoon_driver
Battery choice is also a big factor. If your batteries can't deliver the amps then your motors will not perform
This. This and efficiency in the wiring. If not enough power is generated and/or the power isn't delivered efficiently, you'll lose performance.

Another thing for getting the massive pushing power effect is design. If you lift the opponent's wheels even a millimetre off the ground you're reducing (or removing entirely) resistance and you'll be winning.