I hope this is posted in the right section. If car A is identical to car B in every way, and both have 100 horsepower. Only car B weighs significantly less than car A, obviously car B will win a race on the 1/4 mile because being lighter. Is there a formula that can be worked from to ascertain how much extra horse power car A would need to beat car B?? This is all in a theoretical sense so no extras are taken into account such as gearing, wind resistance, driver skill. eg: Car A = 1000kg with 100HP and Car B = 750kg and 100HP How much extra HP does car A require to win.