The global drive towards decarbonisation has spurred advancements in clean transportation, notably for Heavy Goods Vehicles (HGVs), with hydrogen power standing out as a promising solution. Development in hydrogen-powered HGVs has gained momentum, with both fuel cell and internal combustion engine technologies offering distinct pathways for the future of heavy-duty transport. Major companies like Hyundai, Daimler, and Toyota are investing significantly in hydrogen-powered HGVs, recognizing hydrogen's potential for zero emissions and high energy density. Hydrogen fuel cell technology, particularly in long-haul transport, is gaining traction due to its fast refueling times, extended driving ranges, and zero emissions, offering a sustainable alternative to diesel trucks. On the other hand, hydrogen internal combustion engines provide a cost-effective solution with compatibility to existing infrastructure, though they may emit small amounts of nitrogen oxides. Projects like Hyundai's XCIENT Fuel Cell truck in Switzerland and the UK's Project ICEBreaker aim to showcase the practicality of hydrogen-powered HGVs and support the development of a national hydrogen refueling infrastructure. Companies like Daimler Trucks are advancing with their GenH2 truck, emphasizing efficiency, emissions, and infrastructure requirements in the ongoing debate between fuel cell and hydrogen ICE technologies.