The new Koenigsegg Jesko has been unwrapped at the Geneva International Motor Show, with the Swedish firm describing it as a “megacar” capable of topping 300 mph (that’s 483 km/h). And that, of course, would make it the fastest production car in the world.

The Jesko – named after company founder Christian von Koenigsegg’s father – picks up where the Agera RS left off.

Indeed, it employs a reworked version of that car’s twin-turbo 5,0-litre V8, which the automaker says produces 955 kW on standard petrol and a whopping 1 193 kW on E85 biofuel (and revs to 8 500 r/min). Maximum torque increases to 1500 N.m at 5 100 r/min, with more than 1000 N.m available anywhere between 2 700 to 6 170 r/min.

The Jesko employs a new, so-called “Light Speed Transmission”, a nine-speed multi-clutch unit (designed in-house) that does away with traditional synch rings. The new gearbox weighs 90 kg, including wet clutches, flywheel, fluids, starter motor and oil pumps. Gearshifts are made via either steering wheel paddles or the “manual-style” shifter sited in the traditional central position.

The latest model’s carbon-fibre monocoque chassis is 40 mm longer and 22 mm taller than that of its predecessor, which the firm says has allowed for “more generous” headroom and legroom. Active rear steering ships standard, while the Jesko’s new optional carbon-fibre wheels are billed as the “lightest and strongest” production items of their size (20-inch front and 21-inch rear), shod in Michelin Pilot Sport Cup 2 rubber.

The Jesko features an aggressive aerodynamics package that includes an active double-profile rear wing and the deepest ever front splitter fitted to a Koenigsegg. The vehicle boasts a downforce payload of 800 kg at 250 km/h (at its most aggressive setting), with that figure rising to 1000 kg at 275 km/h.

We can't wait for Koenigsegg to point the new Jesko at a long, straight stretch of tarmac and confirm its official top speed...