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Named after the founder and CEO of Koenigsegg, Jesko von Koenigsegg, the all-new Jesko succeeds the legendary Agera RS. The Koenigsegg Jesko is a street-legal megacar that caters to very specific tastes. If you demand the ultimate in engine power and precision handling, you won’t be disappointed by the Jesko’s immense twin-turbo engine, which boasts the world’s lightest V8 crankshaft.
At the core of the Koenigsegg Jesko lies a new 5.0L twin-turbocharged V8 engine that generates 1,280 hp on standard gasoline and up to 1,600 hp on E85 biofuel. One of the engine’s defining characteristics is a flat-plane 180-degree crankshaft that weighs just 5.5 pounds. Why a flat-plane design? It promotes uniform firing across engine banks for a signature sports car sound, while lightweight connecting rods and pistons developed by Koenigsegg’s engine architect, Dr. Thomas Johansson, minimize vibration.
The engine head has been redesigned with a ‘tumble’ valve on the intake side to increase turbulence as air is pumped into the engine. Turbulent air provides a faster burn rate, which leads to more efficient and effective combustion. The head is cast by Formula 1 suppliers Grainger and Worrall using new F1-grade technology to produce a head that is both stronger and lighter.
The air injection system comprises a small electric compressor driving air from a 20-litre carbon fibre tank connected directly to the two large turbochargers.
Traditional turbochargers are often burdened with turbo lag – the gap where exhaust driven gases are insufficient to transfer boost via the compressor wheel to the intake side. Bigger turbos mean even more lag, which is why many companies opt for twin-turbo systems with a small, fast-spooling turbo providing quick response before a larger turbo engages to provide maximum boost.
The Koenigsegg air injection system uses a timed, 20-bar burst of air strategically aimed within the patent-pending turbo housing in order to pre-spool the two large turbos. This process eliminates turbo lag and surge. This unique solution provides instant response with massive boost prior to the exhaust gases taking over to power the turbos.
The air injection system is also used to accelerate the process by which Jesko’s catalytic converters get to operating temperature on start-up. This is an important emissions reduction measure and fits with the Koenigsegg efficiency philosophy – using systems or parts to perform more than one function.
The fuel injection system has been re-designed and now includes an extra fuel injector, making Jesko the first production car in the world with three injectors per cylinder. Koenigsegg’s V8 has always had two injectors per cylinder fitted to the traditional fuel rail. A third injector has been added in the intake plenum, which injects fuel directly above the intake trumpets for each cylinder. The added aeration means a much cooler cylinder, much cleaner combustion, and less strain on the engine at the top of the power range.
The cylinders in Jesko’s new twin-turbo V8 are fitted with the world’s first individual in-cylinder pressure sensor system for serial production. This allows the Koenigsegg-designed and manufactured Engine Management System to monitor and operate each cylinder at maximum efficiency and closer to the edge for the ultimate in flexibility and control.
This mix of wholesale changes and incremental technology improvements results in an increase in the engine’s rev limit – to 8500rpm – and an increase in power to 1600hp on E85 fuel. When run on regular gasoline, the engine produces 1280hp. Torque is increased to 1500 Nm.
Jesko features not only the most powerful Koenigsegg internal combustion engine ever made, but also – we believe – the most powerful internal combustion engine of any homologated production car in history.
Harnessing the Koenigsegg Jesko’s incredible engine power is a new 9-speed multi-clutch transmission, complete with nine forward gears and multiple multi-disc wet clutches. This transmission is known as the Koenigsegg Light Speed Transmission, and executes gear changes so smoothly, they’re almost imperceptible. With UPOD (Ultimate Power On Demand) technology, the transmission essentially has a mind of its own and can choose the correct gear for optimal power and acceleration.
The Koenigsegg LST uses shifting mechanisms with two modes to differentiate between ‘normal’ (single-increment) and UPOD gear changes. The gear selector paddles and central shifter both have notched mechanisms that allow for two types of shifting.
Press the desired paddle or central shifter to the first notch and the transmission instantly changes one gear, as normal.
Press the paddle or the central shifter beyond that first notch and you are actively making use of UPOD’s jump capability. The transmission’s intelligent UPOD system will instantly detect your optimum gear and engage that gear for you.
Many drivers miss the organic feeling of a manual shifter and how it makes you feel more engaged with the car. Jesko offers its unique LST shifting capability in two different forms – paddle shift and ‘manual’ shift.
Modern sports car drivers are already accustomed to steering wheel paddles. They will feel perfectly accustomed to shifting gear in Jesko with dual-notch paddles located in the customary position, behind the steering wheel.
Jesko also offers an old-school alternative, with a short-throw ‘stick-shift’ installed and fitted with the same dual-notch operation. A push to the first notch changes one gear. A harder push to the second notch initiates UPOD and maximises the Koenigsegg LST´s full capabilities.
LIGHT | SPEED
The Koenigsegg LST represents a revolution in the way multi-clutch transmissions drive your vehicle.
Equally revolutionary is the size and weight of the system.
Where ‘traditional’ dual-clutch technology improved vehicle performance, this improvement came at a significant cost in terms of weight. Modern high-performance DCTs can easily weigh well in excess of 120 kilograms, and DCT-equipped cars always weigh more than their manual-transmission counterparts.
Minimisation of weight lies at the heart of the Koenigsegg philosophy and the Koenigsegg LST is no exception.
It provides vastly improved performance and functionality, yet the 9-speed Koenigsegg LST transmission weighs just 90kg, including all fluids. The physical package is less than 50% of the length of Koenigsegg’s previous-generation 7-speed CIMA transmission. This small size keeps weight closer to the center of the car, improving weight distribution and handling.
Koenigsegg’s new Light Speed Transmission, coupled with Jesko’s increased engine output and improved aerodynamics deliver the ultimate road-friendly track car. It continues Koenigsegg’s tradition of innovation and advances the company’s ongoing quest – the pursuit of automotive perfection.
The Koenigsegg Jesko ushers in a new carbon fiber and aluminum monocoque that’s longer and higher than past models, creating more room inside the cabin. The Agera’s Triplex Suspension system makes an appearance on the Jesko, but this time, a second Triplex unit is integrated into the front suspension for razor-sharp handling. With well over 2,000 pounds of downforce, the Jesko will maintain rock-solid grip as you weave through the highways and byways of Southwest Ranches.
Adaptive active rear steering is a Koenigsegg innovation that intuitively senses the will of the driver and delivers responsive feedback at any speed. It monitors throttle position, brake position, speed, and more to ensure the Jesko corners like a champion, and delivers superb fuel economy and a stronger grip in the process. With a new front splitter and rear diffuser, downforce is increased while drag is decreased, resulting in sturdiness at high speeds and stronger essential airflow to the rear wing.
ACTIVE ENGINE MOUNTS
The engine mounts used in the new Koenigsegg Jesko are taken from the existing Regera. They are active engine mounts designed to deliver a more relaxed ride at lower speed.
When driving at posted speeds, the mounts stay soft to isolate engine noise and vibrations. During spirited driving, the mounts firm up to solidify the car and give greater response. The effect is visceral, transforming the car from relaxed to active in the blink of an eye.
NEW WHEEL DESIGNS
Jesko is equipped with two new wheel designs – one forged aluminium and one carbon fibre. Both are designed to be as light as possible for their size, with the carbon wheels being the super-light option.
Both front and rear wheels are larger than the Agera wheels that came before them. Still, the 21” x 12” rear carbon wheels weigh just 8.4 kilograms each, while the 20” x 9.5” front wheels weigh 6.7 kilograms.
Lighter wheels help to minimise unsprung weight – the mass that is not controlled by the vehicle’s suspension system. They also allow for faster acceleration, better braking and more responsive cornering.
The enlarged wheel design allows for larger brake discs and better brake cooling while still retaining optimal strength and super-light weight for the wheel’s size.
Jesko’s new wheels are fitted with Michelin Pilot Sport Cup 2 tires as standard. Michelin’s all-new Pilot Sport Cup 2 R is an available option for dry weather use only.
The Pilot Sport Cup 2 R is Michelin’s latest high-performance tire. It features a new compound, increased sidewall strength and a new tread pattern to provide a contact patch 10% bigger than the standard Cup 2 tire.
Michelin’s track tests suggest an improvement in lap times with the Cup 2 R similar to what the same car on standard Cup 2’s might achieve with a 10-30% increase in engine output, depending on the car.
Koenigsegg works closely with Michelin to provide customers the absolute best in on-track and on-street performance. The new Michelin Pilot Sport Cup 2 R is the perfect compliment to Jesko’s new engine, gearbox, chassis and aerodynamics package.
TRIED AND TRUE, LEARNED FROM EXPERIENCE
These new technologies are the perfect compliment to Koenigsegg’s existing chassis dynamics package, developed over 20 years at the cutting edge of vehicle performance.
Koenigsegg uses the industry’s longest front and rear wishbones, more akin to Formula racing than a typical road car. Enlarged wheel bearings in lightweight housings provide an unrivalled mix of responsiveness and stability.
Our adjustable dampers are manufactured by the Swedish specialists at Öhlins, and then customised with new electronics at the Koenigsegg factory in Ängelholm. The dampers are fully electronically adjustable for both bump and rebound damping, as well as spring ratio and ride height, with suspension management modes available at the driver’s fingertips. Once fitted, they provide the perfect compliment Koenigsegg’s in-house traction and stability control programs for the ultimate in dynamic performance, safety and control.
Koenigsegg has been breaking records – both in a straight line and on the track – for 25 years. Jesko has been designed to build on this pedigree, especially on the track, where its combination of power, aerodynamics, chassis dynamics and technology will set new standards in high-performance driving for years to come.
The Koenigsegg Jesko succeeds the Agera, inheriting a thoughtful design heritage. Joachim Nordwall, Design Director, had this to say about the Jesko, ““Even though the Agera turned out to be a road monster, there was a level of simplicity and humility to its design, something that reflects the character of both Koenigsegg as a company, and our founder, Christian von Koenigsegg. This design ethos is also present in Jesko. It’s humble and assertive, but not angry.”
The new double-profile rear wing has been placed as far back as possible for maximum downforce and increased control. Following a design first used in the Koenigsegg One:1, the wing is top-mounted to minimise disturbance on the underside of the wing – the surface most responsible for providing downforce.
The wing is boomerang shaped, mirroring the rear curvature of the car as closely as possible in order to maximise the wing’s surface area and ensure the most extreme rearward positioning. The new rear wing is a double-profile design that allows a higher angle of attack without stalling the wing, resulting in higher downforce.
The front splitter is the deepest/longest ever used on a Koenigsegg car and features integrated active flaps underneath to maximise on-track performance. Flap size has been increased to balance the front of the car against the enlarged rear wing. This balance is critical in managing over/understeer. The active front flaps can even assist with preserving the nose of the car, releasing downforce during braking to prevent the front of the car from scraping against the road.
The design process for Jesko has been a constant dance between aesthetics and airflow. Panel surfaces were designed, then flow-tested, re-designed, then flow-tested – again and again. This evolution led us to a design that remains visually stunning while delivering astounding aerodynamic capability.
Airflow efficiency is critical for two reasons. First, to direct air where it’s needed, whether it be for downforce, for engine intake or for cooling. Second, to direct excess air as efficiently as possible to avoid turbulence, which results in drag.
Jesko has been designed with this in mind, using the air to push the car into the tarmac while at the same time, passing through that air in as slippery a manner as possible. The rear wing angle is variable, capable of either maximum downforce or low drag settings, which are controlled automatically depending on driving conditions.
Subtle areas also contribute to this effort. The vented areas over the front tyres, for example, disperse low-pressure air from the tyre well that can cause lift, which would negatively impact steering feel and handling.
Even the rear view mirrors play a part, adding 20kg of downforce and directing airflow towards the rear of the vehicle.
In terms of cooling, air from underneath the front of the car is directed towards the intercooler intakes at the sides. The rear of the car has been left open to allow maximum airflow, thereby evacuating heat from the engine bay.
The result of this focus on balancing maximum downforce with minimal drag is the most aerodynamically aggressive car ever to wear a Koenigsegg badge, as can be seen by the car’s amazing downforce numbers:
Jesko delivers a downforce payload of 800 kilograms at 250 km/h at the car’s most aggressive setting. That figure rises to 1000 kg at 275 km/h before reaching a maximum of 1400kg. These figures are a 30% increase over the Koenigsegg One:1 at similar speeds, and a 40% increase over the Agera RS.
Koenigsegg’s aerodynamics team has harnessed nature to provide unprecedented straight-line and lateral grip.
Working with the design team, they have combined this capability with stunning, flowing lines, thereby fulfilling the brief for a design that is 100% Koenigsegg, and 100% focused on astounding track performance.
Exteriorly, the Koenigsegg Jesko makes a bold statement as a street-ready megacar, ready to conquer the roads ahead with a resounding growl and expert precision. Inside the cabin, however, it’s comfortable, lavish, and conveniently designed. Autoskin opens the doors and hoods via remote control, and built-in sensors can detect obstructions so as to prevent damage to the doors. Rich materials, such as leather, carbon fiber, and alcantara, line the cabin. Sport bucket seats can be controlled through the SmartCenter touchscreen, allowing you to find the ideal seating position and heating level.
Speaking of touchscreen technology, the Jesko has it in spades. The infotainment system includes a 5-inch steering wheel-mounted SmartCluster digital dashboard and a 9-inch SmartCenter central display. You’ll have all the information you need right in your line of sight. SmartWheel is also a standard feature; the Jesko sports two small touchscreens with haptic controls, so drivers can easily access their phones, as well as audio controls, the car lift system, and more.
The SmartCluster has a circular central zone full of essential information – tachometer, speedometer, power, boost, gear selection and essential driver warning lamps. Outside of the central zone are gauges for fuel level, fuel pressure, oil pressure and temperature.
While the Smartcluster screen physically rotates with the steering wheel, the central zone – and the key information within it – always remains level. This ensures the information is always readable. Having the screen rotate with the steering wheel means it is never obscured by the steering wheel spokes as the wheel is turned.
The 9-inch SmartCenter touchscreen provides control over various infotainment and control systems installed in the car.
Driver and passenger can use SmartCenter to operate the automated climate control system, audio and navigations systems, Bluetooth connectivity controls (inductive charging is fitted), custom lighting controls, and electric controls for mirrors, doors, seats, windows and seat heating.
SmartCenter is also the interface for various vehicle setup and monitoring screens such as traction control, ESP, tire pressure monitoring, and more. If the driver needs to know how something operates, they can always consult an electronic copy of the owner’s manual, also installed on the system.
The software driving SmartCluster, SmartCenter and SmartWheel has been developed in-house by Koenigsegg with support from Qt Professional Services. The application development framework used in development is Qt from The Qt Company. All systems can be updated over-the-air via the Koenigsegg Cloud.
With the SmartCluster screen located directly on the steering wheel, some space has been liberated on the main dashboard. Koenigsegg has developed an analogue G-force meter that can be fitted in this space.
The hand-made, high-precision analogue G-force meter is housed inside a beautiful chronograph-inspired bezel that sits atop the dashboard on either the driver or passenger side. The gradient scale is calibrated to account for the angle of both the car and the bezel. The pendulum and needle have been designed to provide a fascinating visual account of the car’s behaviour.
It’s modern performance displayed in a beautiful, old-school setting.
The ambience of the Koenigsegg cabin is one of luxury combined with technology. Rich materials combine with traditional artisan craftsmanship and modern convenience to provide a truly beautiful place to drive without compromise. The cabin is modern and elegant, yet easily switches between relaxed cruising and high-performance track work.
The cabin benefits from Koenigsegg’s new, larger monocoque, with increased legroom and headroom, greater rearward visibility and an even more airy feeling thanks to a larger curved windscreen.
That air of freedom is enhanced even further when the lightweight roof is removed, turning Jesko from a sleek, sporting coupe into a sun-loving roadster.
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