However, you’d be quickly stymied in reality by the fact that dropping practically any car onto its wheels from 20 feet in the air would, at minimum, bottom out the suspension and possibly cause the tires to contact the insides of the wheel arches, stopping them dead.

OP’s question very much feels like a question an elementary school boy would dream up, so I pretty much imagine a kid playing with a toy car in this situation. In that case, the numbers and reality don’t matter, it’s all about the fantasy and built-up anticipation of the potential energy and the car going fast - the action is what matters, I don’t think it’s a serious question.