2011 Geneva Motor Show Preview: Koenigsegg Agera R

Article by Christian Andrei, on February 28, 2011

Koenigsegg announced that at the 2011 Geneva Motor Show will bring the mighty Agera R, an extreme version of the Agera supercar. The car will be powered buy an impressive 5.0-liter twin-turbo V8 engine delivering 1,115 horsepower and 885 lb-ft of torque on E85, while using the 95-octane gasoline you will get ‘only’ 940 hp.

The engine is mated to a seven-speed dual-clutch gearbox. Although no numbers were released, the car is expected to hit 60 mph (96 km/h) in just three seconds and a top speed of 250 mph or 402 km/h, which means that the Bugatti Veyron Supers Sport will be the car you will see it in front of you when you will hit the top speed.

Regarding the design, the car will come in an interesting paint scheme which was requested by the owner. Also, the owner of this beauty is a skier and as you can see the car also features a custom carbon fiber roof box developed in conjunction with Thule.

Other features to be seen on this supercar are the Vortex Generating Rim (VGR) wheels which act as turbine vanes that help maximize downforce wrapped in high performance Michelin tires developed especially for this model and rated up to 260 mph.

The design of the new Koenigsegg Agera was created in adherence to the "less is more" minimalistic philosophy, which preaches that a car’s shape should be functional sans any extra features, aside from those necessary for regulation, aerodynamics, ergonomics, safety and practicality. Koenigsegg believes that when followed, this philosophy should result to a beautiful yet purely purposeful car. The carmaker compared this to the evolution of a dolphin that had to meet similar criteria to become what they are.

As for the Agera, this car is not only proportionate, compact and muscular but is also timeless and efficient. While it remains true to the original philosophy, shape and size of the original Koenigsegg CC that was developed around a decade and a half ago, its looks, feeling and performance are futuristic. To validate and optimize the aerodynamics of the Agera, Koenigsegg had it undergo computational fluid dynamics (CFD) and wind tunnel testing over several years.

Its large dynamic rear wing belies the fact that the Agera features a drag coefficient of 0.33 Cd in high speed mode and Cd 0.37 in track mode. Although the Agera’s full width is 2 meters, its frontal area is only 1.87 sqm, resulting to a Cd*A value of 0.62, allowing the car – particularly its Agera R version – to have a theoretical top speed of 440 km/h. As standard, the top speed of all Agera models is restricted to 375 km/h, although Koenigsegg can unlock this for shorter periods of time, provided that all conditions are met.

These include factors such as road condition, tire wear and service level of car. Top speed mode could be unlocked in the Agera’s infotainment system. The Agera should remain stable when cruising in high speeds, and this stability is achieved by implementing two large side air intakes that ensure that the car’s pressure point remains behind its mass center. This configuration allows the Agera to become more directionally stable as its speed increases.

The front splitter and rear diffuser were designed and optimized to ensure that the Agera remains stable under high speed braking. Also, the rear diffuser was developed to provide constant downforce even at wide yaw angles, thereby resulting to a high level of performance and safety. Since hypercars typically generate substantial downforce in low to medium speeds and less downforce in very high speed as not to create too much drag and not to overload the tires, they are usually equipped with heavy hydraulically operated wings and flaps.

To cater to those hypercar demands while adhering to the "less is more" philosophy, Koenigsegg developed a dynamic system that includes a new rear wing that changes its angle of attack with the pressure of the wind, instead with the aid of hydraulics. Thus, this rear wing adjusts to the speed or wind resistance at any instance, compensating for headwind or tailwind at the given speed.

This system has several advantages – more adaptive, lighter, simpler and more intuitive than heavy and complex hydraulics systems. In creating and validating the dynamically controlled adaptive aerodynamics of the Agera, Koenigsegg had the hypercar undergo CFD testing. Moreover, this adaptive rear wing is specified with pylons that double as air extrusion channels.

These air channels go from the engine bay all the way to the back of the pylons, thereby creating an air passage. This setup creates the so-called venturi effect: air flows past the pylon and sends away hot engine bay gases, thereby reducing pressure in the engine bay while increasing the rush of cooling air through the side radiators. This also helps reduce air pressure under the Agera, resulting to more low drag downforce.

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