Not much change from Alfa Romeo 4C concept model during display at the Geneva Motor Show 2012 that designed by Alfa Romeo Centro Stile (Alfa Romeo Style Centre). 

According to an article from December 2011, the 4C uses a new all aluminium 1.8 L (1,800 cc) 230 brake horsepower (170 kW) In line 4 cylinder engine. This engine also has the capacity to produce 300bhp. The engine has been designed to keep weight at a minimum, and will probably appear in the 159 replacement, the Giulia. The body will not be made entirely of carbon fiber, with the front and rear frames being aluminium. This increases the weight to around 900 kilograms (2,000 lb).0-62 miles per hour (100 km/h) should be achieved in 4.5 seconds with a top speed of 250 km/h (155 mph) due to a power to weight ratio of 4 kg/hp. Alfa Romeo has also confirmed a new 1.8 litre, 300 PS (221 kW) engine, which may or may not appear in the 4C.