The Koenigsegg One:1 will have a 1 kg / 1 hp ratio, hence the "One:1" designation.
In an interview given to carsuk.net, Christian von Koenigsegg said that it will be limited to five units and all cars will be sold in China. To reach that power-to-weight ratio, the supercar will lose some weight and its engine will probably output somewhere around 1250 hp (932 kW) - 1350 hp (1006 kW), considerably more than the 1140 hp (850 kW) of the Agera R. With a curb weight of 1,290 kg, the Agera R has a power-to-weight ratio of 0.88 hp / kg.
The One:1 will retain the same twin-turbo V8 5.0-liter engine, but design will be significantly changed in comparison to recent special/limited editions. It will ride on carbon fiber wheels and feature a new front fascia with a lower front splitter, along with a fixed carbon fiber roof that has an air scoop. The back of the car will get a redesigned diffuser and wing.