The Onyx concept's skeleton is completely innovative, developed with know-how from Peugeot Sport and the group's Research and Development Division.
Made of monolithic carbon, this central structure comprises only twelve pieces. It includes the front and rear struts, doing away with the need for offset panels. The torsional stiffness and weight of the structure are then optimised, with the weight measured at barely 100 kg.
Bolted to the carbon shell, the 3.7-litre hybrid V8 HDi FAP engine and axles reflect the experience of Peugeot Sport, gained and developed on tracks the world over.
Cooled by pipes starting in the roof via NACA intakes, the V8 transmits its 600 hp to the rear wheels via a 6-speed sequential gearbox.
This power makes ideal use of the engine's compact proportions. 4.65 m long, 2.20 m wide, 1.13 m high, weighing 1,100 kg. Fitted with tyres specially developed by Michelin, 275/30 at the front and 345/30 at the back, the 20" rims have their hubs held to the structure by a double triangulated link and in-board suspension at the front and rear.
Intelligent, the HYbrid4 technology recovers kinetic energy normally lost during braking. Stored in lithium-ion batteries, this energy is then automatically redelivered during acceleration, boosting power by an additional 80 hp. The driver remains unaware of the management of this function, something that presented a real challenge. The engine technicians had to make it work on an engine that, in competition, operates at extreme levels.
With less than 2 kg per horsepower, the Onyx achieves its high performance without impairing the purity and elegance of its style. To do so, the Onyx is equipped with a flat carbon pan that creates a powerful ground effect. In this way, it was possible to limit aerodynamic parts to a strict minimum, by extensions to the carbon-fibre structure and by the mobile spoiler that loads the rear axle during braking. This is achieved by four 380 mm carbon discs at the front and 355 mm at the rear.