Most efficient 4 stroke engine, according to Guinness

Wartsila 31The recently launched Wärtsilä 31 engine has achieved a Guinness World Records title for the most efficient 4-stroke diesel engine. Guinness World Records is a universally recognized authority on record breaking achievement. This prestigious achievement was verified on May 26, 2015, and confirms Wärtsilä’s technology leadership position.

The listing is based on the Wärtsilä 31 engine’s highest fuel efficiency levels, with its diesel fuel consumption being as low as 165 g/kWh. This is far lower than any other 4-stroke diesel engine currently available on the market.

The Wärtsilä 31 engine is designed to serve various types of vessels in the Offshore, Cruise & Ferry, and other marine segments where the power range requirement is from 4.2 to 9.8 MW.  The engine can be operated using a range of different fuels, and comes in three alternative versions; Diesel, Dual-Fuel (DF) and Spark-Ignited Gas (SG). The multi-fuel capabilities that the Wärtsilä 31 brings to the market extend the possibilities for operators to utilise different qualities of fuels, from very light to very heavy diesel, and a range of different qualities of gas.

“The marine industry is focusing more than ever on efficiency and flexibility. The validation of the Wärtsilä 31 by Guinness World Records as being the most efficient 4-stroke diesel engine in the world speaks for itself. Ship owners and operators now have the chance to take a more efficient approach to improving vessel operations and reducing costs.  The Wärtsilä 31 clearly redefines efficiency,” says Roger Holm, Senior Vice President, Engines, Wärtsilä Ship Power.

Guiness WRLink to Guinness World Records homepage:

Link to Wärtsilä 31 page on
Wärtsilä 31 on


Wärtsilä in brief:

Wärtsilä is a global leader in complete lifecycle power solutions for the marine and energy markets. By emphasising technological innovation and total efficiency, Wärtsilä maximizes the environmental and economic performance of the vessels and power plants of its customers.
In 2014, Wärtsilä’s net sales totalled EUR 4.8 billion with approximately 17,700 employees. The company has operations in more than 200 locations in nearly 70 countries around the world. Wärtsilä is listed on the NASDAQ OMX Helsinki, Finland.

This article has 1 Comment

  1. it is now officially on page ### in the Guinness book of records, just after the man with the most toothpicks attached to his face while doing pushups. 🙂

    I heard they are also competing in the category, most expensive engine spares in the world and are about to get the world record in harsh competition with many other contenders.

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