Ferrari P4

The Ferrari P was a series of Italian sports prototype racing cars produced by Ferrari during the 1960s and early 1970s.

Although Enzo Ferrari resisted the move even with Cooper dominating F1, Ferrari began producing mid-engined racing cars in the early 1960s with the Dino-V6-engine Formula One Ferrari 246 P and the sport prototype SP-series.

The V12 sports car racers followed in 1963. Although these cars shared their numerical designations (based on engine displacement) with road models, they were almost entirely different. The first Ferrari mid-engine road car did not arrive until the 1967 Dino 206 GT, and it was 1971 before a Ferrari 12-cylinder engine was placed behind a road-going driver in the 365 GT4 BB.

250 P

Ferrari produced the 250 P in 1963 in response to the FIA introducing a prototype class for the upcoming season of the World Sportscar Championship. This was a new design, with a chassis unrelated to existing 250-series Grand Touring cars. Designed by Mauro Forghieri, the 250 P was an open cockpit mid-engined rear wheel drive design, utilizing a tubular space-frame chassis, double wishbone suspension, rack and pinion steering, four wheel disc brakes and a longitudinally-mounted V12 engine with a 5-speed gearbox and transaxle. The 250 Testa Rossa-type single-cam 3.0-litre engine was supplied by six Weber 38 DCN carburetors and produced 310 bhp at 7,500 rpm. This was the first time a V12 engine was mounted in the rear of a Ferrari sports racing car.

The 250 P achieved immediate success on the racetrack, winning the 1963 24 Hours of Le Mans, 12 Hours of Sebring, 1000 km Nürburgring, and Canadian Grand Prix. The cars were raced by Scuderia Ferrari in Europe and NART in the Americas. Notable drivers included John Surtees, Ludovico Scarfioitti, Willy Mairesse, Lorenzo Bandini and Pedro Rodriguez.

In total Ferrari produced four 250 P chassis (serial numbers 0810, 0812, 0814 and 0816) and one development mule based on a Ferrari 246 SP chassis (number 0796). All 250 P chassis were converted to 275 P or 330 P specification following the 1963 racing season.

275 P and 330 P

For the 1964 season, Ferrari developed the 275 P and 330 P. These were improved versions of the 250 P with larger displacement engines and slightly modified bodywork. The tubular space-frame chassis and most other components remained the same as in the 250 P. The 275 P used a bored-out 3.3L version of the 250 Testa Rossa-type engine originally utilized by the 250 P. The 330 P used a different design, a 4.0L Colombo-designed V12 based on engines used in the 400 Superamerica road cars. The 330 P developed more power than the 275 P (370 bhp vs 320 bhp) but weighed more (785 kg vs 755 kg). Some drivers preferred the extra power of the 330 P while others appreciated the more nimble feel of the 275 P and the two models were raced concurrently. Production of these types included three brand new chassis and conversions of all four 250 P chassis. It is not possible to clearly determine the number of chassis produced with each engine type as 275 and 330 engines were swapped as needed between cars.
275 P and 330 P cars were actively and successfully raced by Scuderia Ferrari, NART and Maranello Concessionaires during 1964 and 1965 seasons. The most notable result was a 1-2-3 sweep at the 1964 24 Hours of Le Mans. The Scuderia Ferrari-run 275 P driven by Guichet and Vaccarella took first, followed by a Maranello Concessionaires 330 P (Hill/ Bonnier) in second and a Scuderia Ferrari 330 P ( Bandini/Surtees) in third.Museo Casa Enzo Ferrari