It was taken over by English Electric in November 1966, who were then bought by GEC in 1968, with diesel engine production being transferred to the Ruston Diesels Division in Newton-le-Willows, Lancashire of GEC at the former Vulcan Foundry, which was eventually bought by the German MAN Diesel (now MAN Diesel & Turbo) in June 2000.
Ruston & Hornsby proizvaja dizelske motorje za ladje in lokomotive, nato so se v začetku leta 1950 povezali z nekdanjim kolegom Frank Whittle in Power Jets Ltd v R & D (ki je postal RGT) odprl prvo proizvodno linijo za izgradnjo plinsko-turbinskih motorjev za kopensko in morsko proizvodnjo energije.