Again IIRC there was a V8 or V6 or both that was used in tank transporters (Antar's ?). It could have been called a Rover Meteor ?
The puke green color is a hint that it is a Meteor.
Even though Rolls Royce were fully committed to the manufacture of piston engines, they could not help but be intrigued by Rover's gas turbine jet developments, and decided to take a serious interest once the test flights of the 'Wellington Bomber' had proved a success. They quickly announced that as a matter of policy they would now like to become involved in gas turbine engine development. With their obvious commitment to successful aero engine development this new policy had to be taken seriously by the British Government.
At the same time the Rover management, while acknowledging their continued success with the new technology gas turbine engines, did not wish to move on to continued development of aircraft engines on a permanent basis.
The solution was a masterly compromise which would see Rover hand over their gas turbine development work to Rolls Royce, receiving in return from Rolls Royce a large and vital tank engine contract. Rover took over the entire Rolls Royce 'Meteor' engine project which was a brilliantly advanced piston engine design.This consisted of a much modified but un-supercharged version of the V-12 'Merlin' aircraft engine, and would be produced for the latest heavy allied tanks.
This engine became the most powerful piston engine with which Rover has ever been associated, and developed something like 700 BHP, all very necessary when the incredible weight of the tank is taken into account. This engine was further developed and in Mark IV version, sprang to prominence in the world famous 'Centurion' tank. Later fuel injected M120 versions powered the bigger and more impressive 'Conqueror' tanks.
Later a development from the 'Meteor' was the 'Meteorite' engine range, which was essentially two thirds of a 'Meteor', being a V-8 while the 'Meteor' was a V-12. Meteorites were developed during the late 1940's and were built in both petrol and diesel engine forms for vehicles, for marine use and for use as stationary power units. The mighty 'Antar' tank transporter, built by Thornycroft, was powered by a 'Meteorite', and was often seen dragging 'Meteor' engined tanks around the world.
http://www.speedace.info/automotive_directory/rover.htm