The evolution of JCB Dieselmax to JCB Hydromax

This summer, we’re taking on a landmark record attempt: a new world hydrogen land speed record, powered by the JCB Hydromax car. But this new attempt hasn’t happened overnight. In fact, it’s the latest in our long history of innovations, and we’re taking a look back through them now.

2000s: The diesel exploration begins

In the early 2000s, diesel engines experienced an evolution – and JCB was among the many businesses that began exploring the power possible through diesel. After buying them from other manufacturers, in 2004, it was time for us to create our own JCB diesel engines – which saw us become the first company in 60 years to manufacture diesel engines using state-of-the-art design and manufacturing services.

Diesel engines are known for their ability to handle high boost pressures, produce massive torque and remain robust under stress – making it the ideal choice for a speed record attempt.

2006-2019: The diesel rollout

Since our record-breaking milestone in 2006, we’ve continued to push the boundaries of diesel engine engineering. The evolution of the JCB Dieselmax range reflects a clear focus on innovation, performance, and build quality. By prioritising real-world customer needs and improving efficiency, we’ve developed a range of mid-power engines that set the standard for off-highway equipment.

We’ve driven significant progress in emissions reduction, with modern machines producing up to 50% less CO₂ than comparable models built in 2010. In October 2022, this commitment was recognised when the EU Stage V JCB Dieselmax 430 engine was named Engine of the Year at the Diesel Progress Summit.

Core models such as the JCB Dieselmax 448 are designed for durability, extended service intervals, and outstanding fuel efficiency. And for higher-demand applications, heavy-duty options like the JCB Dieselmax 672 deliver enhanced power output and strong torque performance.

Today, Dieselmax engines are fitted into 75% of our off-highway equipment, from Backhoe Loaders to Loadall telehandlers, and tracked excavators to wheeled excavators.

2021-2026: Hydrogen innovations

Once we began exploring hydrogen, it was clear the potential for continual innovation was there. In 2021, we showcased the world’s first hydrogen-powered Backhoe Loader and telescopic handler, and by 2023, we were ready to officially launch the super-efficient hydrogen combustion engine.

Awards, recognition and more firsts followed – including the first hydrogen-powered Backhoe hitting the UK roads in 2023. Now hydrogen engines were successfully powering Backhoe Loaders and generators, Lord Bamford thought it was about time for another record attempt.