Koenigsegg Sadair's Spear: Road-legal track car revealed

The Koenigsegg Sadair’s Spear takes the Jesko and adds more power, torque and downforce to deliver a big dollop of extra track-day fun.

Behind the passenger cell is an upgraded version of the Jesko’s 5.0-litre twin-turbo V8. Thanks to a revised calibration, and reworked airflow and cooling systems, when using regular unleaded the V8 now makes a mammoth 969kW of power at 7800rpm, or 1212kW if it’s being fed E85 fuel.

Torque figures are unchanged, with a maximum of 1500Nm produced at 5100rpm, and at least 1000Nm available between 2700 and 6170rpm. The engine is redlined at 8500rpm.

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All of the engine’s fury is once again fed to the rear wheels via a nine-speed multi-clutch “Light Speed Transmission”.

For reference, the regular Jesko makes a mere 941kW on 95-octane unleaded fuel, and 1177kW on E85. The Sadair’s Spear power-to-weight ratio exceeds 1:1.

Stopping ability comes courtesy of 410mm ventilated ceramic discs with massive six-piston calipers up front, and 395mm ventilated ceramic discs with four-pot calipers at the rear.

To keep the car on the ground the aero package has been revised with larger canards, tweaked wheel-arch louvres, a bonnet vent with integrated Gurney flap, and a redesigned top-mounted double-blade rear wing.

With a 1385kg kerb weight, the Sadair’s Spear is 35kg lighter than the Jesko. Around 2.6kg of those savings come through reduced sound insulation, with a further 1.3kg lost thanks to “new carbon-fibre techniques”.

The cabin features redesigned carbon-fibre seats with memory foam padding, and can be fitted with a six-point racing harness. While niceties like the digital instrument cluster and infotainment display remain, the gear shifter has been eliminated, meaning the only way to shift gears is via the flappy paddles behind the steering wheel.

The Sadair’s Spear rides on 275/35 Michelin Pilot Sport Cup 2 tyres with 20-inch rims up front, and 325/30 rubber wrapped around 21-inch wheels at the rear. Semi-slick Cup 2R tyres are also available.

Christian von Koenigsegg, the company’s founder, named the Jesko after his father as a “heartfelt tribute” for his support during the supercar maker’s early years.

The Sadair’s Spear is in turn named after his dad’s favourite horse, and the one he rode in his final race as a gentleman jockey in 1976.

Production of the Sadair’s Spear is limited to 30 cars, and all are already spoken for after a private unveiling in front of prospective customers.

No pricing has been announced, but it’s probably safe to assume it will cost more than the US$2.85 million (A$4.36 million) required to snaffle a Jesko.