Kids these days. There is a rather huge difference between the two. My 69 Cutlass with a 502 crate motor and a tall rear end would go 160 but it was terrifying. About 140 was reasonable and she saw that many times. I could have put a small wedge on the trunk and a damn under the front and made that better but 140 is real fast.Curious how they determined that 112 was the magic number. It seems like... a person crashing at 112 vs 155 would still have an equal chance of dying
tl:dr Force varies as the square of the velocity. Have a safe day.