New Koenigsegg Alert! This is the £3.8m, 1,603bhp Sadair's Spear, built to smash records

Thought the 1,578bhp, bewinged Jesko Attack was as extreme as road-legal Koenigseggs could get? Christian von Koenigsegg begs to differ, because here is the new Sadair’s Spear, a lighter, more powerful, more downforce-y and therefore more track-focused take on Koenigsegg’s hypercar, designed to wreak havoc on your concept of fast and rearrange your internal organs.

First, that name. You may recall the Jesko was named after Christian’s father for his 80th birthday, to say thanks for his help with the company in its early years. Beats a pair of socks. You probably didn’t know Jesko was a keen jockey, nor the name of the horse he rode in his final race in 1976. Yep, Sadair’s Spear.

The engine is familiar from the Jesko – a 5.0-litre twin-turbo V8, connected to Koenigsegg’s nine-speed Lightspeed transmission, that does without a flywheel so it revs to its 8.500rpm redline like a superbike in 0.2s. Here, revised engine calibration, redesigned air intakes and improved cooling means peak power climbs by 25bhp to 1,603bhp on E85 (1,282bhp on regular unleaded).

No word on acceleration or top speed figures (the Jesko has a theoretical top speed north of 300mph), only that during its shakedown it smashed the Gotland Ring lap record by 1.1 seconds. Previous record holder? The Jesko Attack.

Improved aero has a big part to play in that. The active top-mounted ‘double-blade’ rear wing combines with a stretched rear end design for more downforce and stability. That’s balanced with larger canards, louvres and hood vents at the front. New seven-spoke turbine blade Aircore carbon-fibre wheels are specific to the Sadair’s Spear and wrapped in even wider track-focused tyres.

The carbon-ceramic brakes get upgraded pad materials, while the self-levelling suspension features lighter springs – part of a total 35kg weight-saving package that includes losing 2.6kg of sound deadening, unique carbon-fibre seats and other lightweight interior components.

If you love faffing around before going anywhere you can option six-point harnesses instead of normal seatbelts, but this isn’t a fully stripped-out race car - you still get the wheel mounted digital instrument cluster, a stereo, and wireless charging for your phone.

“Sadair’s Spear represents a natural progression for Koenigsegg - an impeccable balance of raw power, refined aerodynamics, and extraordinary road presence,” said Christian von Koenigsegg. “This car is destined to set records. Achieving such track dominance in a fully road-legal vehicle is nothing short of remarkable.”

The Sadair’s Spear is limited to just 30 cars, and each one cost £3.8m... all of which sold out instantly when Koenigsegg gave its most loyal customers a private viewing. Better luck next time.