The top cars from the event compete in the race.

"We would not have done it if the cars were competing."

Cars compete against the clock, and start at the same time.

More than 100 cars from six countries will compete for $100,000 in prize money.

To be sure, the two cars may not compete for buyers very long, if at all.

The car has most recently competed in the 2011 24 hours of Spa.

Cars compete one at a time and speeds are low so safety is high.

Although all cars compete at the same time, there are separate classes.

The car did compete in select races during the 2012 season.

A few races were run in 1991, with only a handful of cars competing.