You would need the margin of victoryand the mph of the 2nd car to the line. Take mph and convert it to feet per second.
if my math is right
1 mph= 1.466 ft per sec.
so multiply the 2nd car to the finsh mph by 1.466
let's say 150 mph x 1.466 =219 feet per sec.
Take amount of time it takes the 2nd car to get there, you said .025 and multipy that by the 219 feet per sec. that comes out to 5.475 feet.
If you want it in inches, multiply that answer by 12.
It's early in the morning. Not quite awake yet. I hope my math is right.