The RMS Titanic was powered by two triple-expansion reciprocating steam engines. Made by Harland & Wolff's Engine Works, each engine was the size of a three-story building and had a combined output of 30,000 hp.
https://s3-us-west-1.amazonaws.com/h...nic_engine.jpg
More:
Titanic - Titanic's engines
Titanic’s Propulsion Plant
Previously:
https://www.homemadetools.net/forum/...654#post123533
https://www.homemadetools.net/forum/...107#post103313
https://www.homemadetools.net/forum/...299#post110063
https://www.homemadetools.net/forum/...4656#post80329