Watch - Koenigsegg One:1 smashes Agera R's 0-300-0 km/h time

Koenigsegg test driver beats the company's own record by over three seconds

'Do not try this at home', reads the message on Koenigsegg's video of the 1341bhp One:1 accelerating to 300km/h - that's 186.4mph - and back to zero again in under eighteen seconds.

You might expect that's because of the speed, and then dismiss it on the basis that you'll probably never own a One:1 anyway.

But actually, it might be something to do with the fact that factory driver Robert Serwanski barely touches the steering wheel during the run - making only minor course adjustments as the car slingshots up the firm's test track in Ängelholm, Sweden.

The run to 300km/h and back again was completed in just 17.95 seconds, having reached maximum velocity in 11.92sec and used the remaining 6.03sec to bring the car to a halt.

That's 3.24sec quicker than the Agera R achieved doing the same run. Further accelerative potential is clear in the car's 0-200-0mph run of 20.71sec. The time to reach the double-ton? 14.328sec. When Jethro Bovingdon tested the One:1 in evo 202, he described the sensation of acceleration:

'At 2000rpm the One:1 is starting to really ramp-up. It already feels, I ponder, up there with a 991 Carrera at full noise. Then it hits 3000rpm and my brain quickly cycles through other frames of referenc... the Carrera GT is gone, an Enzo shrinking away like a diesel supermini.

'Now 4500rpm: boom, the P1 and 918 evaporate and the indelible memory of the knockout hit of torque from a Veyron Super Sport when it hits full boost leaks away like grains of sand through my fingers. 'From 5000rpm to the 8250rpm limiter, all cognitive reasoning gets battered into submission.'

To get just a taste of what that's like, you can watch the One:1's run above.

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