Everllence: first order for two-stroke ammonia engines

Höegh Autoliners orders four units for Aurora-class car carriers

Click to learn more. Graphic visualisation of Everllence’s 7S60ME-LGIA dual-fuel engine, four of which have been ordered by Höegh Autoliners, for installation aboard its new Aurora-class Pure Car/Truck Carriers. Source: Everllence.

Everllence (formerly MAN Energy Solutions) will supply four 7S60ME-LGIA (Liquid Gas Injection Ammonia) dual-fuel engines to Höegh Autoliners, for installation aboard Höegh’s new Aurora-class Pure Car/Truck Carriers (PCTCs). HD Hyundai Heavy Industries will build the engines in South Korea.

A total of 12 Aurora-class vessels are in the process of being built, with the last four to be ammonia-powered featuring the Everllence engine (and delivered in 2027). The ammonia-powered PCTCs will be built at an “undisclosed Asian shipyard”, with already-delivered, ammonia-ready Aurora-class PCTCs built at the Jiangsu Shipyard in China.

The engines are the beating heart of our vessels, and we take it as a clear mark of confidence that Everllence has chosen us to install some of the world’s first two-stroke ammonia engines on our final four Aurora Class vessels…Reaching zero is a shared ambition, and Everllence plays a vital role in helping us realize our goal of operating our large PCTC vessels on zero-carbon fuels from 2027.

Sebjørn Dahl, Chief Operations Officer, Höegh Autoliners, in Everllence’s official press release, 27 Aug 2025

This order – one of several ammonia pilot-projects we have in China, Japan and South Korea – gives us encouragement that we are on the right path, as does the widespread industry interest in our progress. We have adopted a responsible, safety-first approach to developing this engine on account of ammonia’s particular risk-profile, and are confident that ammonia will ultimately become one of three major, alternative fuels in the market along with methanol and methane.

Bjarne Foldager, Head of Two-Stroke Business, Everllence, in his organisation’s official press release, 27 Aug 2025

The announcement also reveals the timelines and development status for Everllence’s two-stroke ammonia engines. By the end of next year, Everllence plans to have a “small number” of operational engines on the water, feeding data back and helping push towards full commercial market entry:

We have now been running our two-stroke ammonia test engine since 2023 and can confirm that the ME-LGIA’s combustion is right where we want it. Using the Diesel principle, the ME-LGIA engine concept has many of the same merits as our existing dual-fuel engines that already entered operation over a decade ago. Inspired by these engines, we are – among other innovations – using the same sealing-oil design for the fuel-booster injection valves as this has proven to be particularly important and efficient. By end-2026, we tentatively expect to have a small number of demonstration projects on the water to enable a commercial market introduction of the G50-, S60-, G60-, G70- and G80-bore ME-LGIA engines based on positive service experience.

Christian Ludwig, Head of Two-Stroke Sales and Promotion, Everllence, in his organisation’s official press release, 27 Aug 2025