The Jesko Absolut is powered by a 1280 bhp (1600 bhp on E85), twin turbo charged V8 engine, featuring the world’s lightest V8 crankshaft, weighing just 12.5 kg. This flat-plane 180-degree crankshaft produces more power with greater efficiency while achieving a high 8500 rpm rev limit. Its design allows even firing across engine banks, creating a visceral engine sound. Koenigsegg has also designed super-light connecting rods and pistons to counter the tendency of greater vibrations in flat-plane engines.

Koenigsegg's CFD team went over every detail of the Jesko in a meticulous study in order to minimise drag.  The most obvious change made was the removal of the Jesko Attack's massive rear wing, which dropped downforce from 1400kg to 150kg.  The target drag coefficient for the Jesko Absolut was 0.28Cd.  Our CFD team overachieved, with a final figure of just 0.278 Cd.  

While peak pressure occurs in the Jesko Absolut's front radiator, the rest of the car has significantly reduced downforce. Modifications applied to the Jesko Absolut include more streamlined front splitter winglets, re-designed front louvers, an elongated tail, and the addition of aerodynamic, removable wheel covers. Every surface finish is intended to be as slick as possible, to allow air to glide effortlessly over the car.