There was some question over whether it could retain its Guinness World Record due to certain auto modifications, but it was allowed to hold the title until the Koenigsegg took it. Towards the end of the second run, the Agera RS even surpasses 450 km/h - close to the speed of a small aircraft.
Last month, Lilja set a record for the fastest 0-400kph-0, doing it in 36.44 seconds from behind the wheel of the same auto. The average speed achieved, measuring runs in both directions, was 447.0 km/h (277.9 mph).
Before confirming that "it was over by lunch on day one", the brand responded to journalists on Twitter to confirm that it had completed the run using the "standard fitment" Michelin Pilot Sport Cup2 tyres.
You can watch Koenigsegg's record-breaking run, courtesy of Racelogic, below.
The attempt took place at Pahrump, Nevada, with factory drier Niklas Lilja behind the wheel. How long the mark will stand for, however, is anyone's guess with Henessey having just unveiled its new Venom F5 hypercar amid claims of 300mph capability and Bugatti having yet to put the Chiron to the test in anger. The 1,341 hp auto made two runs on the dead-straight highway, one in each direction, and its speeds were averaged as required for Guinness-recognized world record. It's also said that the Agera RS's surge of torque did not drop off after 240 miles per hour.
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