The Koenigsegg Jesko is a limited production mid-engine sports car produced by Swedish automobile manufacturer Koenigsegg. The car was introduced at the 2019 Geneva Motor Show and it completely sold out before the show ended. The car succeeds the Agera. The name Jesko is a tribute to the company founder's father, Jesko von Koenigsegg. There are two variations of the car – "Absolut" (top speed) and "Attack" (track-focused).
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 and a compression ratio of 8.6:1. The engine has a power output of at 7,800 rpm and of torque at 2,700 to 6,170 rpm on normal gasoline and has a power output of and 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 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 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 and it is at least 50% shorter in length than the previous 7-speed dual-clutch unit. It has 9 forward gear combinations using a layout with an input shaft with 3 fixed gears which is mated to a secondary shaft with 3 gears fixed to the output shaft and 3 clutched gears mated to the input shaft and an output shaft with 4 clutched gears (one set is used for reverse which mates directly to the input shaft), allowing the transmission to change gears without an interruption in power delivery due to the speedy nature of clutch actuation and overlap between the clutches opening and closing. The engine's crankshaft is mated directly to the LST and uses the rotating mass of the transmission components in place of a traditional flywheel. 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.
Chassis and suspension
Unlike its predecessors, the high-downforce Attack variant of the Jesko has Koenigsegg's 'Triplex' dampers at the front and the rear combined with traditional Öhlins dampers. A horizontal rear damper prevents the rear from pressing on the ground during hard acceleration. The front dampers stabilise the car at high speeds while active rear wheel steering ensures further stability at all performance levels.
The carbon body tub used in the Jesko is longer and wider from that of its predecessor in order for more passenger room. The tub has been redesigned and incorporates an aluminium monocoque structure for increased rigidity.
Wheels, brakes and tires
The car comes standard with forged aluminium centre lock wheels, with diameters of 20 inches at the front and 21 inches at the rear. Lighter carbon fibre wheels are available as an option, weighing at the front and at the rear. The tyres are Michelin Pilot Sport Cup 2's with codes of 265/35 20 for the front and 345/30 21 for the rear. Michelin Pilot Sport Cup 2 R tyres dedicated for track driving are also available as an option. The braking system uses ventilated carbon-ceramic discs.
Interior
The use of a redesigned monocoque improves leg and headroom in the interior of the Jesko when compared to previous Koenigsegg models. Though weight saving is a priority for interior features, the car is still equipped with amenities such as a climate control system, an infotainment system with a 9.0-inch screen, Apple CarPlay and USB phone charging. The car has unique screens mounted in the steering wheel spokes and a 5.0-inch screen mounted behind the steering wheel displaying vital information to the driver. The seats will be made from hollow carbon fibre but will be electrically adjustable.