English Electric diesel engines were manufactured by the English Electric company of the United Kingdom for both stationary and rail transport use. The range was derived from the "K type" engine (10" bore x 12" stroke), developed in the 1930s. These diesel engines were marketed under the English Electric name into the 1960s and, later, under the name Ruston-Paxman.
The "K" type engine had 2-valve cylinder heads and ran at 600-680 rpm. The Mark I "RK" and "V" types had 2-valve cylinder heads. The Mark II "RK" and "V" types had 4-valve cylinder heads. They ran at 750-900 rpm, and were available with turbochargers and intercoolers.
A large number of these engines were built and these are just a few examples:
All cylinder numbers were used in Australia.
NSW was the only state not to have EE powered locos, Vic only had a few (F class).