Like the land speed record, the production auto speed record requires at least two runs to take place at similar times, with an average speed derived from the two.
On its first run the Koenigsegg registered a top speed of 271.2mph, beating the Veyron even while battling an incline and oncoming winds. Previously, it was reported that the Koenigsegg Agera RS blocked record Bugatti Chiron for acceleration up to 400 km/h and further stop.
Niklas Lilja was behind the wheel when the auto reached the speed on a public road in Nevada, which had been closed for the attempt.
The world has a new fastest production vehicle: the Koenigsegg Agera RS. The average speed achieved, measuring runs in both directions, was 447.0 km/h (277.9 mph). The tires that were used are Michelin Pilot Sport Cup 2 tires, and Michelin reps were on hand to be sure everything was good with the tires.
However, it seems the Swedish firm's latest record may not last long, after Hennessey revealed a new, faster Venom last week. The numbers were recorded by Racelogic with the VBOX HD2.
The limited-edition Agera RS is powered by a 5-litre V8 producing 1,160bhp and 738lb ft of torque, allowing it to make the sprint from 0-62mph in less than three seconds.