Diesel engines

Reliability, efficiency, and low operating costs

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Diesel engines - 
A new benchmark in efficiency and overall emissions performance

With increasing demands on owners and operators to improve efficiency while also decarbonising, the maritime industry is facing multiple challenges. However, there is also opportunity. While the development of alternative fuels is a critical element in the decarbonisation journey, the opportunity to increase efficiency and reduce energy consumption is also a proven part of this equation. ​ Wärtsilä Propulsion solutions and services are built on unique experience, technical and engineering expertise all focused on delivering the highest efficiency, safety and manoeuvrability to enable the future of vessel propulsion.

  • The power to target net-zero

    Meet the new Wärtsilä 25 engine - maximised flexibility, minimised emissions

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Engines_1160 x 200

Customer references

  • Sten Idun

    Sten Idun

    Sten Idun is a 16400 dwt Chemical Tanker with a Wärtsilä equipment package of engines, gear and propulsors. Sten Idun vas commissioned 2003 and features a PTI booster and takes me home mode.

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  • Hirta


    The MPV Hirta, launched in 2008, has a diesel electric propulsion system comprising three Wärtsilä 9L20 engines driving a reduction gear and a controllable pitch propeller.

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  • Samar-slide


    83m luxury yacht

    Read more about Samar
  • Stadt Valiant

    The Valiant is a 90 BP escort tug powered by two Wärtsilä 8L26 engines, and is well suited for missions such as offshore terminal assistance and coastal towing.

    Read more
  • Molslinjen-ferry-1138-420

    Express 4

    High-speed RoPax ferry with a compact axial flow jet solution

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Orders stream in for Wärtsilä 31
28 MAR 2018 Article
3 min read

Orders stream in for Wärtsilä 31

The demand for what the Guinness Book of World Records calls ‘the world’s most efficient 4-stroke engine’, the...
Wärtsilä 20 - Small changes, big results
12 JUN 2018 Article
4 min read

Wärtsilä 20 – Small changes, big results

We revisit a classic, making it better and more efficient than ever before. The upgraded Wärtsilä 20 engine...
29 NOV 2018 Article
6 min read

Wärtsilä 14: lighter, smarter and greener

The new engine in Wärtsilä’s smart marine solutions range is compact, cost-efficient and more sustainable....

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