Ferrari 275P & 330P

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.

For 1965 Ferrari also built a customer version of P2 cars; they were equipped with a SOHC 4.4 L engine and thus were named 365 P2. In 1966 Ferrari upgraded their 365 P2 cars with new bodywork by Piero Drogo.

The Ferrari 412 P was a "customer version" of the 330 P3 racing car, built for independent teams like NART (0844), Scuderia Filipinetti (0848), Francorchamps (0850), and Maranello Concessionaires (0854). These cars had carburettor engines instead of the factory Lucas fuel injection.