The Wärtsilä 31 is the first of a new generation of medium speed engines, designed to set a new benchmark in efficiency and overall emissions performance.
The Wärtsilä 31 is available in 8 to 16 cylinder configurations and has a power output ranging from 4.7 to 9.8 MW, at 720 and 750 rpm. The launch of the Wärtsilä 31 introduces a 4-stroke engine having the best fuel economy of any engine in its class. At the same time, it maintains outstanding performance across the complete operating range. Its modular design enables a significant reduction in maintenance time and costs, thereby improving power availability and reducing the need for spare parts.
Wärtsilä 31 is recognised by Guinness World Records as the world's most efficient 4-stroke diesel engine
The Wärtsilä 31 retains its high efficiency and environmental values throughout the entire lifecycle of the vessel.
Lowest fuel consumption over a wide operating range.
Highest cylinder power in its segment, 610 kW/cylinder.
Available in Diesel, Dual Fuel (DF) and Pure Gas (SG) versions.
Meets the coming IMO Tier 3 regulations when operating on gas, and with an SCR when using diesel fuel. The SCR has a minimal effect on fuel consumption.
Reliability guaranteed through extensive validation and Wärtsilä’s vast manufacturing experience.
Supported by Wärtsilä’s extensive global service network.