After the Second World War, he graduated as a pilot in the Royal Air Force, he teamed up with John Heath, the HWM - car company and denied numerous race at Alta, ERA and from 1950 to HWM. Even in the sports car segment Abecassis was active, especially at Aston Martin. To his great successes were class wins at the 24 Hours of Le Mans and the 12 Hours of Sebring. In Formula 1 he was against it rare to see in two World Cup races ( Grand Prix of Switzerland in 1951 and 1952) but he never came to the finish. This was followed by numerous other sports car racing with a HWM - Jaguar sports car in local races in the UK, he was able to celebrate some victories.
After the accidental death of his companions John Heath at the Mille Miglia 1956 Abecassis lost interest in racing and retired from the company HWM. He founded a workshop in Ibstone, which he headed until shortly before his death in 1991.