Rolls-Royce Tests World’s First High-Speed Marine Engine Operating Solely on Methanol

Rolls-Royce has announced the successful testing of the world’s first high-speed marine engine powered exclusively by methanol. Conducted at the company’s test facility in Friedrichshafen, Germany, the trial marks a key milestone in the meOHmare research project — a collaborative effort aimed at developing climate-neutral propulsion systems for maritime applications.

The test involved engineers from Rolls-Royce Power Systems working alongside partners from the meOHmare consortium, which includes injection system specialist Woodward L’Orange and research center WTZ Roßlau. The project is funded by the German Federal Ministry for Economic Affairs and Energy and aims to produce a comprehensive concept for a CO₂-neutral marine engine using green methanol by 2025.

Milestone in Methanol Propulsion

“This is a genuine world first,” said Dr. Jörg Stratmann, CEO of Rolls-Royce Power Systems AG. “To date, there is no other high-speed engine in this performance class that runs purely on methanol. We are investing specifically in future technologies in order to open up efficient ways for our customers to reduce CO₂ emissions and further expand our leading role in sustainable propulsion systems.”

Rolls-Royce’s methanol engine development forms part of the company’s broader transformation programme focused on reducing carbon emissions, under the “lower carbon” strategic pillar. It also aligns with efforts within its Power Systems division to expand the company’s marine propulsion business.

Engineering a New Fuel System

Methanol, a liquid alcohol, presents distinct engineering challenges compared to traditional marine diesel. It does not ignite spontaneously, requiring a redesigned combustion process and fuel injection system.

“We have fundamentally redesigned the combustion process, the turbocharging, and the engine control system – and even adapted our test bench infrastructure,” explained Dr. Johannes Kech, Head of Methanol Engine Development at Rolls-Royce Power Systems. “Initial tests show that the engine is running smoothly – now it’s time for fine-tuning.”

Industry Signal for Green Methanol Adoption

“With this successful test run, we are sending a clear signal: green methanol is a future-oriented fuel – and the technology for it is here,” said Denise Kurtulus, Senior Vice President Global Marine at Rolls-Royce. “The single-fuel methanol engine is an attractive solution, especially for operators of ferries, yachts or supply vessels who want to reduce their carbon footprint. The task now is to create the framework conditions for wider use.”

Alongside the single-fuel engine, Rolls-Royce is also developing a dual-fuel concept capable of operating on both methanol and diesel. This is intended as a transitional solution until green methanol production and availability scale up globally.

Towards Commercial Deployment

The meOHmare project is expected to conclude by the end of 2025, delivering a detailed design framework for CO₂-neutral marine engines. The research supports broader industry trends toward alternative marine fuels as shipping moves to meet international decarbonization targets.

If successful, the methanol-powered engine technology could find applications across commercial shipping segments, including short-sea ferries, offshore support vessels, and leisure craft — all seeking practical pathways to reduce emissions.