The Ferrari 250 GTO is a GT car produced by Ferrari from 1962 to 1964 for homologation into the FIA's Group 3 Grand Touring Car category. It was powered by Ferrari's Tipo 168/62 Colombo V12 engine. The "250" in its name denotes the displacement in cubic centimeters of each of its cylinders; "GTO" stands for Gran Turismo Omologato, Italian for "Grand Touring Homologated." Just 36 of the 250 GTOs were manufactured between 1962 and 1964. This includes 33 cars with 1962-63 bodywork (Series I) and three with 1964 (Series II) bodywork similar to the Ferrari 250 LM. Four of the older 1962-1963 (Series I) cars were updated in 1964 with Series II bodies. When new, the 250 GTO cost $18,000 in the United States, with buyers personally approved by Enzo Ferrari and his dealer for North America, Luigi Chinetti. This model has since become highly desired by automobile collectors and sales have repeatedly set price records. The current record for world's most expensive Ferrari was set in June 2018 when a 1963 250 GTO (chassis 4153GT) was sold in a private sale for $70 million. In 2004, Sports Car International placed the 250 GTO eighth on a list of Top Sports Cars of the 1960s, and nominated it the top sports car of all time. Similarly, Motor Trend Classic placed the 250 GTO first on a list of the "Greatest Ferraris of All Time." Popular Mechanics named it the "Hottest Car of All Time." Design and development The 250 GTO was designed to compete in Group 3 GT racing, where its rivals would include the Shelby Cobra, Jaguar E-Type and Aston Martin DP214. The development of the 250 GTO was headed by chief engineer Giotto Bizzarrini. Although Bizzarrini is usually credited as the designer of the 250 GTO, he and most other Ferrari engineers were fired in 1962 due to a dispute with Enzo Ferrari. Further development of the 250 GTO was overseen by new engineer Mauro Forghieri, who worked with Scaglietti to continue development of the body. The design of the car was a collaborative effort and cannot be ascribed to a single person. The mechanical aspects of 250 GTO were relatively conservative at the time of its introduction, using engine and chassis components that were proven in earlier competition cars. The chassis of the car was based on that of the 250 GT SWB, with minor differences in