Honestly, it’s not so much about horsepower as much as the gear ratios in the transmission and what the governor is set at in the vehicle. The Honda civic SI has a governor set at 147, and a whopping 205hp engine. Sure 500 could get there a bit faster, but the civic could still do it.

This all being said, there’s really no reason anybody should really need to travel at anywhere near 120 anyway. 147 and 151? Insanity. These are speeds that you need full protective gear and a car with roll cages. Not a stock car with a convertible top.