For comparison sake, if the losing car were going 10mph (14.7 feet per second) at the finish line, 0.1 sec = 1.47 ft. Now lets expand that to say 86mph(126.1 ft/sec) quarters and 0.1 sec = 12.61 ft. This is a simplified example, but it gets the point across.
But at the end they are going to be very close to the same exact distance apart no matter how fast or slow the cars go at the end. Its not going to vary more than about a carlength. But, you really have to assume that both cars have similar trap speeds.