When Top Gear’s (ex) presenter Jeremy Clarkson test drove the Koenigsegg CCX in Top Gear series 8, he quickly realised that the Swedish supercar was hugely fast. In fact, he went as far to say that it was the fastest car he’d driven on the test track at the time.

It was at this moment we believe that the British public fell in love with Koenigsegg, a then little known car manufacturer that tailored to the bonkers rich. Fast-forward to the last five years, and it’s plain to see that Koenigsegg has not let up. They introduced the Agera in 2011 which had a 5.0-litre twin-turbocharged V8 engine which produced 940 bhp and 1,100 Nm (810 lb /ft) of torque. This car was utterly savage and ravaged anything in its way.

Then, they introduced the Agera R, which was the Agera amplified – think special Michelin tires, new downforce components and an engine upgrade to 1,140bhp. This particular car went on to break six world land speed records for a production car including an astonishing 0-300 km/h to 0 km/h run in 21.19 seconds. Bugatti Veyron SuperSport eat your heart out.

To give you an idea of how fast the Agera R is, here’s it demolishing a Porsche 918:

And here’s the Agera R demolishing a Bugatti Veyron Vitesse:

This brings us on to the curiously named One:1. The name stems from the power to weight ratio of the car – (1360 PS) to weight (1360 kg) – and it’s the self-titled ‘world’s first mega car’ with a track focus unlike anything Koenigsegg has created before. And now that you’ve seen just how easily the Agera R can demolish other fast cars, we’re sure you’ll agree it’s hard to imagine how Koenigsegg could improve on it. But they have. Oh they have.

The One:1 Is fitted with a variant of the same 5.0-litre twin-turbocharged V8 engine used in all Ageras but it produces a lot more power and a stunning 1,011 lb /ft. The engine weighs just 197kg and the car only weighs 1360kg – less than a Volkswagen Golf. This power to weight ratio is unlike anything the world has seen before, and the result is mind-blowing.

Remember that world record of 0-300 km/h to 0 km/h in 21.19 seconds set by the Agera R? Well it has been smashed by the One:1. Here’s the video:

If you’re having trouble playing it, here’s the low-down: The Koenigsegg One:1 completed the 0-300 km/h to 0 km/h in 17.95 seconds – a 3.24 second improvement on the Agera R. That’s a new world record and it means no production car on the planet is faster – not your LaFerraris, not your P1s, not your Veyrons and sorry Nissan fans, not even your GT-Rs.

So what’s next for Koenigsegg? Well with the way the market is heading, you’d be safe putting money on a hybrid next using technology similar to that in the McLaren P1. With electric motors on top of that 5.0-litre twin-turbocharged V8 engine, 2,000bhp should be achievable for these Swedish nutters. Now that would be a sight to behold.