Vulcans used Olympus 200 and 300 series engines.
.......and, oddly enough, the 100 Series.
History, all you need to know
HERE.
Rolls-Royce Olympus - Wikipedia, the free encyclopedia
What this doesn't tell you is that there were plans for a US license built Olympus. J87, General Electric X-211 (nuclear powered turbo-jet; cancelled)