Mainly in sportscars, with a few single-seater events in Italy, including the 1960 Italian Grand Prix, one of many taking advantage of a dispute between the British entrants and the organisers to make their Grand Prix debut. Alfonso also held US citizenship, moving to the US with his family, who ran a business, when Benito Mussolini came to power in Italy. In the 1950's, Alfonso lived in both countries, competing in SCCA events in the US and Italian road races. In 1957, he won his class at the Mille Miglia. Thiele carried on racing, mainly in Italy until 1964. He moved back to the New York area for a while before finally settling in Novara, where he died in 1986.

Biography last updated 5 Mar 2016