The GTO was based on the mid-engine, rear wheel drive 308 GTB (which has a 3.0 litre V8 engine). The “288” refers to the GTO’s 2.8 litre V8 engine as it used a de-bored (by 1 mm) V8 with twin IHI turbochargers, intercoolers, and Weber-Marelli fuel injection. The 2855 cc engine capacity was dictated by the FIA’s requirement for a Turbocharged engine’s capacity to be multiplied by 1.4. This gave the GTO a theoretical engine capacity of 3997 cc, just under the Group B limit of 4.0 litres.
Ferrari 288 GTO
Ferrari also built five 288 GTO Evoluzione models with more aggressive and aerodynamic body styling and increased power. The engine in the 288 GTO Evoluzione originally put out as much as 650 hp (480 kW). With weight of 940 kg (2,072 lb) the car had a top speed of 225 mph (362 km/h). These cars form the clearest visual link between the 288 GTO and the F40 soon to follow.