English Electric's K, RK and V type diesel engines were manufactured by the English Electric company of the United Kingdom for stationary, rail transport and maritime use between 1934 and 1976.
Initially, the "K" type engine developed in the 1930s were offered in I4, I6, I7 and I8 variants, had 2-valve cylinder heads and ran at 600-680rpm.
Due to the demand of more power, the Mark I "RK" (Revised K) and "V" type were introduced in 1947.
In 1951, the engines received 4-valve cylinder heads, thus creating Mark II "RK" and "V" types which ran at 750-850rpm.
This was changed in 1968 with the introduction of the RK3 series by Ruston-Paxman after the demise of EE in the same year.