The One:1 is so called as it has a power-to-weight ratio of 1:1 – it weighs 1340kg and produces 1322bhp (or 1340 metric horsepower). This power output figure eclipses the P1, LaFerrari and 918 Spyder, and also that of the 1184bhp Bugatti Veyron Super Sport.
The new model from the Swedish supercar firm is derived from the Agera R, which itself boasts a 1100bhp twin-turbocharged 5.0-litre V8. For the One:1, a claimed top speed of more than 273mph is quoted, which would make it the fastest production road car in the world – faster than the 270mph Hennessey Venom GT and 268mph Veyron Super Sport.
Koenigsegg claims this top speed is possible thanks to the One:1’s “high power and high-rpm capability in combination with strong tyres and active aero”.
Koenigsegg, which in 2014 celebrates its 20th anniversary, has equipped the One:1 with a carbonfibre chassis that's 20 per cent lighter than the Agera R’s, active aerodynamics, active ride height, variable-stiffness suspension, upgraded tyres, a lightweight titanium exhaust and a variable turbo housing to boost low-end torque.
The active aero consists of independent flaps left and right under the front splitter and a hydraulic dual-plan rear wing. This helps the One:1 produce 610kg of downforce at 160mph, which is equivalent to that of a McLaren P1.