1834 Wärtsilä is established in the municipality of Tohmajärvi, Finland.
1898 The sawmill and iron works company is renamed Wärtsilä Ab.
1936 Wärtsilä acquires the Onkilahti engineering workshop in Vaasa, Finland.
1938 Wärtsilä signs a licence agreement and the first diesel engine sees the light of day in Turku, Finland in 1942.
1965 The company is re-named Oy Wärtsilä Ab.
1978 Acquisition of 51% of the NOHAB diesel business and the remaining shares are acquired in 1984.
1984 Wärtsilä quoted on the London stock exchange.
1988 A company is set up in India and floated on the Bombay stock exchange. A factory for assembly of diesel engines is built in Khopoli.
1989 Wärtsilä Diesel acquires SACM and Stork Werkspoor B.V. This company is renamed Stork-Wärtsilä Diesel B.V.
1990 Wärtsilä merged into Lohja Corporation, later renamed Metra Corporation.
1991 Imatra Steel is created when Ovako AB is split up between its owners, Metra and SKF.
1995 Wärtsilä Diesel and Cummins Engine Company Inc. set up a joint venture.
1997 Wärtsilä NSD Corporation is created.
1999 The split-up of the Cummins- Wärtsilä joint venture.
2000 Wärtsilä NSD and John Crane-Lips sign an alliance. Metra group renamed as Wärtsilä Corporation.
2001 Wärtsilä sells its holding in Sanitec. Wärtsilä takes ownership of service company Ciserv AB and Sermet Oy.
2002 The Ciserv-group expands. Wärtsilä acquires John Crane-Lips, which operates within Wärtsilä under the name Wärtsilä Propulsion.
2003 Wärtsilä and Volvo Penta to cooperate.
2004 Wärtsilä’s Chinese propeller company starts production.
2005 Wärtsilä acquires DEUTZ- marine engine service business.
