The Land Rover Series IIA was manufactured from 1961 to 1971. The change to Series IIA came about because of a new 2.25-litre engine that was available (an upgrade from the previous 2.0-litre).
The series IIA is considered by many the most hardy series model constructed. It is probably also the type of classic Land Rover that features strongly in the general public's perception of the marque from its many appearances in films and television shows set in Africa throughout the 1960s, such as Born Free. In February 1968, just a few months after the Rover Company had been absorbed into the Leyland Motor Corporation, the Land Rover celebrated its twentieth birthday, with total production to date just short of 600 000. It was whilst the series IIA was in production that sales of utility Land Rovers reached their peak, in 1969-70, with sales of over 60 000 Land Rovers a year.