Remember Koenigsegg’s record-breaking 0-400-0 run? Seems that was just a warm up, as Koenigsegg has now bagged the speed record to rule them all. Yep, it looks like the Agera RS is now the world’s fastest production car.

Details are limited at this stage (the Swedish supercar firm is promising more information in due course), but we do know that the 277.9mph figure is an average taken from two runs, which means this will qualify for a Guinness World Record. A record achieved comfortably - the RS went over 10mph faster than the current holder, the Bugatti Veyron Supersport.

The run was done on a closed road near Pahrump, Nevada, which would explain why we saw a bunch of Koenigseggs in the area when driving the new Jeep Grand Cherokee Trackhawk on a nearby press trip. As with the 0-400-0 run, it was Koenigsegg factory driver Niklas Lilja behind the wheel - he’s clearly a man with adamantium-spec balls.

We can’t wait to see the footage…