Drivers in the 25th Race of Champions (ROC) were revving their engines on Friday (December 14) in Bangkok as they prepared for a weekend of tough competition on the racetrack.

The lineup includes some of the world's top racing drivers, who will compete in the ROC Thailand and ROC Asia races.

This year's event brings together drivers from Formula One, the World Rally Championship, Le Mans 24, MotoGP, IndyCar and more.

They will be pitted against each other in identically prepared cars.

Action gets under way on Saturday (December 15) with a team competition - the Nations Cup - before the individual event on Sunday (December 16).