The Jesko is primarily built as a high-performance track car, with focus on high aerodynamic downforce and more precise handling. Koenigsegg's other current production model, the Regera, is designed as a grand touring-oriented offering.
Specifications: Engine
The engine is a development of the 5.0-litre twin-turbocharged V8 engine used in the Agera. It has four valves per cylinder each with a bore and stroke of 92 mm × 95.25 mm (3.62 by 3.75 inches) and a compression ratio of 8.6:1. The engine has a power output of 1,298 PS (955 kW; 1,280 hp) on normal gasoline and has a power output of 1,622 PS (1,193 kW; 1,600 hp) and 1,573 N⋅m (1,160 lb⋅ft) of torque at 5,100 rpm on E85 biofuel.
Changes from the Agera's engine include the use of a new 180-degree flat-plane crankshaft that saves 5 kg (11 lb) and increases the redline from 8,250 rpm to 8,500 rpm. The Jesko also utilises active rubber mounts from the Regera that reduce engine vibrations in the cabin. The two large turbochargers are equipped with a 20-litre air tank made from carbon fibre, coupled with an electric compressor which feeds pressurised air to the turbochargers at a pressure of 20 bar (290 psi) in order to reduce turbo lag. The engine has pressure sensors for each cylinder in order to achieve real time cylinder monitoring for the multipoint fuel injection system.
Transmission
The engine is mated to an in-house developed 9-speed multi-clutch transmission called the "Light Speed Transmission (LST)"by the manufacturer. The new transmission has a weight of 90 kg (198 lb) and it is at least 50% shorter in length than the previous 7-speed dual-clutch unit. It has 21 possible gear combinations (the gears are arranged in two sets of three gears) and seven clutches allowing the driver to jump to any gear without disturbing the ratio. The transmission has a shift time ranging from 20 to 30 milliseconds. It also has an overdrive mode called "Ultimate Power on Demand" that is designed to skip directly to the optimal gear depending on user input, rather than down or upshifting sequentially to that gear.The transmission is controlled by an onboard computer which uses engine and road speed data to engage a gear. Gears are selected by the driver either using the shift paddles mounted on the steering column or the gear selector.
Gear Ratio 1st gear 4.7200:1 2nd gear 3.6441:1 3rd gear 2.8744:1 4th gear 2.2500:1 5th gear 1.7371:1 6th gear 1.3702:1 7th gear 1.0783:1 8th gear 0.8325:1 9th gear 0.6566:1
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