de Portago began racing sports cars in 1953 after his meeting with the Ferrari importer in the USA, Luigi Chinetti, who asked him to be his co-driver in the Carrera Panamericana. He later raced alone in a personal Ferrari Sport model at the 1954 1000 km Buenos Aires. de Portago won six major races, including the Tour de France automobile race, the Grand Prix of Oporto, and the Nassau Governor's Cup (twice). In Nassau, during the winter of 1956, Portago trailed the car ahead of him by centimeters while travelling at 240 km/h. Portago used his skill to avert careening into a crowd after the driver ahead of him touched his brakes and both cars went into a 180 m skid. Among sports car enthusiasts, de Portago was known as a two-car man, because of the many burned-out brakes, clutches, transmissions, and wrecked cars for which he was responsible. He often needed several cars to finish a race. He participated in 5 World Championship Formula One Grands Prix, debuting on July 1, 1956. His best result was a second place at the 1956 British Grand Prix (a shared drive with Peter Collins), and scored a total of four championship points. In 1953 he raced with Luigi Chinetti in the Carrera Panamericana. During the 1955 British Grand Prix at Silverstone, Portago was thrown from his Ferrari while racing at 140 km/h after losing control on a patch of oil. He was hospitalized with a broken leg.
Die Inhaltsangabe kann sich auf eine andere Ausgabe dieses Titels beziehen.