The Wärtsilä 31DF is the most powerful in its class and available in the range from 8 to 16 cylinder configurations. The power output ranging from 4.6 to 9.6 MW, at 720 and 750 rpm. The Wärtsilä 31DF 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. Through high power output per cylinder it enables a smaller footprint and cost efficient installation. W31DF is significantly also increasing the vessel availability through longer time between overhauls and also offering reduction in maintenance time and costs resulting in industry leading lifecycle operations.
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.
The Wärtsilä 31 is designed to be suitable for a broad range of ship types and applications, both as a main propulsion engine and in diesel electric configurations, or as an auxiliary engine. It can be optimised for running either at constant speed or along a propeller curve. In the Offshore sector, the Wärtsilä 31 is a perfect solution for OSV´s and drilling or semi-submersible vessels, where operational flexibility, high power density, long intervals between overhauls, and high levels of safety are of paramount importance.