Kenneth McAlpine began his racing career in mountain and speed races. In the early 1950s he was part of the Connaught works team and drove the Formula 2 - Connaught Type A in seven Grand Prix races between 1952 and 1955, but did not achieve any world championship points. He made his debut on July 19, 1952 at the Grand Prix of Great Britain . He achieved his best results in Formula Libre races. At the Glover Trophy in 1954 he was third and with a Connaught sports car in 1955, in his final racing season, second in the British Empire Trophy .
McAlpine belongs to the McAlpine family and founded the engineering company of the same name. Since the death of André Guelfi on June 28, 2016, McAlpine has been the oldest living Formula 1 racing driver ahead of Leslie Marr .