It turns out the Koenigsegg Agera RS is quite fast. In fact, it’s now the fastest car in the world.

After a couple of long runs down a closed Nevada desert highway, Koenigsegg factory test driver Niklas Lilja managed to clock the fastest speed recorded for a production car.

The point of the exercise wasn’t to hit a particular speed quickly as Koenigsegg did last month with its 0-400-0km/h sprint, but to find the upper limits of the ‘Egg’s capabilities.

The first run resulted in a very quick top speed of 437.7km/h, which took the Agera RS 4.5km to reach.

While we know the Agera is incredibly impressive, its kerb weight of just 1395kg means it has a ratio of 717kW per tonne.

Even then, it was surprising to see the V-Box data displayed on the video above show the Agera RS notch up a top speed of 457.5km/h over 6000 metres.

Koenigsegg Agera RS speed record

Still, Hennessey predicts the top speed of its new Venom F5 to be 484km/h, which would be astonishing, and who knows what else the Bugatti Chrion is capable of.

Koenigsegg is just enjoying the moment.