Jo Bonnier first entered Formula Two cars in 1966, for the Swiss driver Jo Siffert who drove a Cooper-BRM T82 painted in Swiss racing red and white. The first race of the season was scheduled for Oulton Park but although practice was held the race was cancelled because of snow on the track. Siffert was 15th in practice, almost seven seconds behind the fastest man Jim Clark. At Goodwood Siffert finished in seventh position, one lap behind race winner Jack Brabham. After a crash in practice Siffert failed to start at Pau as the team was unable repair the car before the race. At Reims Bonnier drove the Cooper to ninth position, two laps down on race winner Jack Brabham. Bonnier but didn't fare much better at Rouen as he retired from the race on lap five. Swedish driver Sten Axelsson drove he car at the Karlskoga Motorstadion and finished in 9th place. At the Keimola Ring in Finland local driver Max Johansson drove the car to a 12th position. Giancarlo Baghetti drove the Cooper at the Autodrome de Linas-Montlhery where he retired on lap seven after an electrical failure. Baghetti was also entered in the Formula two class at the German Grand Prix but the team did not attend.