The name One:1 comes from the power (1360 PS) to weight (1360 kg) ratio giving the car 1 bhp per 1 kg weight. The 1341 bhp power output is the equivalent of one megawatt which Koenigsegg claims makes the One:1 the ‘world's first megacar’. The car is more focused as a track car than the previous cars made by Koenigsegg.
Koenigsegg had to sacrifice a few things to be able to achieve their goal with the car. There is an airscoop on the removable roof so it would not have been possible to stow the roof in the boot like previous models. As such Koenigsegg have taken advantage of this and modeled the front to create more downforce which reduces boot capacity by 40%. The Koenigsegg One:1 is fitted with a variant of the same 5.0-litre twin-turbocharged V8 engine used in the other Ageras.
It produces 1,360 PS (1,000 kW) at 7500 rpm and 1,371 N·m (1,011 lb·ft) of torque at 6000 rpm.[2] Total weight of the engine is only 197 kg (434 lb) thanks to a carbon fiber intake manifold and the aluminium construction. The transmission is a 7-speed dual clutch paddle shift.