Just under 4 metres long, 2 metres wide and 118 cm high. The design choices of the Alfa Romeo 4C are just as bold as its dimensions. Rather than use extreme power, the decision was taken to minimise weight instead. This challenge underlies the design of every component of the car.
The result is amazing: an unladen weight of under 900 kg propelled by 240 HP, giving a weight to power ratio of under 4 kg/HP. A figure that promises genuine supercar agility and performance. This impressively low weight has been achieved by using ultra-light materials like carbon fibre, aluminium and composites, all chosen for maximum dynamic efficiency. Fast, powerful and evolved. On the 4C, advanced materials combined with Alfa Romeo's innovative processes and values have created a true concentration of efficiency.
First and foremost, carbon fibre was chosen to create the central passenger cell.
Carbon fibre offers major advantages over conventional materials, which are “isotropic”, i.e. have the same strength characteristics in all directions.
In unidirectional carbon fibre, because all the fibres run in the same direction, parts made from it can be up to 5 times stronger.
Aluminium, a strong but incredibly lightweight material, was used to make the engine block, the engine itself and the front and rear cells that protect the passenger compartment against impacts.
Behind the occupants, a high strength steel roll-bar prevents deformation in the event of roll-over. Advanced composite materials, previously thought too difficult to apply to production models, complete the car's innovative structure. On the Alfa Romeo 4C, low density composites are used for the outer body as they guarantee better stability than aluminium and 20% less weight than sheet steel.
The 4C's 1750 cc turbocharged power plant is based on state-of-the-art engine technology. And Alfa Romeo's engineers have made this technology even more aggressive and efficient. 4 cylinders, an aluminium block and structure, a new generation turbocharger, ultra-high pressure direct fuel injection, two continuously variable valve timing units, scavenging technology and a dual clutch enable this 1750 cc unit to deliver unprecedented sporting performance.
Torque and specific power set new records for this size of engine. Maximum power of 240 HP is reached at 6,000 rpm, confirming the unit's extraordinary elasticity and dynamism. It produces exceptional results both during pick-up and when accelerating. The Alfa Romeo 4C reaches 100 km/h in 4.5 seconds and develops a top speed of 258 km/h. And that is not all; this impressive level of performance has been achieved with minimal impact on the environment. Thanks to multiple injection control and advanced anti-friction and energy loss reduction systems, the emissions of the Alfa Romeo 4C fall well within the strict limits of Euro 6.
Driving pleasure is the result of carefully balanced design. Rear wheel drive and a centrally mounted engine: the architecture of the Alfa Romeo 4C is typical of competition cars in which perfect weight distribution is the primary objective.
The Alfa Romeo 4C has rear wheel drive to make full use of the dynamic advantages afforded by this configuration. Rear wheel drive gives better grip under acceleration, when engine power throws weight towards the rear of the car. Rear wheel drive also lets you enter curves at higher speeds, delivering a far more intense driving experience.
The aluminium engine is centrally mounted. This significantly reduces weight as it eliminates the need for a propeller shaft and optimises weight distribution by concentrating mass near the centre for crisper handling.
Sport suspensions, self-ventilated brake discs and different diameter tyres: the 4C boasts an advanced ride control system, conceived to keep weight down to a minimum.
The suspension adopts race-derived technical solutions to optimise performance and deliver unrivalled driving pleasure. At the front, the Alfa Romeo 4C features a double wishbone configuration that gives direct and unfiltered feedback from the road. At the rear, advanced MacPherson suspension ensures superb road holding and driving fun, even in the most extreme manoeuvres. Both front and rear suspension systems are made from aluminium and high strength steel.
The braking system is designed for high performance race track use. The perforated, self-ventilated front discs and Brembo calipers take the car from 100 to 0 km/h in only 36 metres. And to ensure maximum grip and prevent skidding under all conditions, the 4C is fitted with different diameter tyres, 17”-18” or 18”-19”, with the larger size on the rear for the best possible handling.