Totally depends on the speed. If we're both going 40 mph and a car is 15 feet long, then 7 car lengths takes me 1.8 seconds. But if we're going 80 mph, it's onl

Totally depends on the speed. If we're both going 40 mph and a car is 15 feet long, then 7 car lengths takes me 1.8 seconds. But if we're going 80 mph, it's only 0.9 seconds.