British driver Andy Green has done it again. At 64, the retired Royal Air Force fighter pilot pushed a bright yellow, pencil-slim machine called the JCB Hydromax across Utah’s Bonneville Salt Flats to an average of 406.320 mph. The feat sets a new world land speed record for a hydrogen-powered internal combustion vehicle. It also tops his own 20-year-old diesel benchmark of 350.092 mph set at the same location.
The two runs, one clocking 400.623 mph and the return pass 412.135 mph, produced the official average recognized by the Fédération Internationale de l’Automobile. Observers on the salt described the car as a blur against the vast white expanse. Green emerged from the cockpit calm. He had just more than doubled the previous hydrogen combustion record of 185.5 mph.
This outcome arrives days after practice runs that already hinted at potential. Last week the Hydromax touched 368.347 mph during Bonneville Speed Week. Yet the official attempt demanded perfect conditions, FIA timing equipment, and two-way runs within the hour. The salt delivered. So did the engineering.
The Hydromax stretches 32 feet long. Its twin hydrogen engines, adapted directly from JCB’s heavy construction excavators, together deliver 1,600 horsepower. They function by mixing pressurized hydrogen gas with air before ignition. No carbon dioxide exits the tailpipe. JCB, the British manufacturer known for backhoes and loaders, poured more than $134 million into hydrogen engine development before this project. Chairman Anthony Bamford framed the effort plainly. “If you’re serious about emissions, you have to be serious about hydrogen, and a land speed project is the perfect way to prove it,” he said at the car’s unveiling in May, according to AP News.
Green echoed the sentiment. “It’s the fuel of the future,” he told reporters before the attempt. The remark carries weight coming from a man whose previous claim to fame involved shattering the sound barrier on land. In 1997 Green drove the jet-powered Thrust SSC to 763.035 mph across Nevada’s Black Rock Desert. Sonic booms rattled a nearby town. That record still stands. Supersonic speeds were never the goal this time. The hydrogen car operates in a different realm of physics and risk.
Bonneville’s surface looks otherworldly. A remnant of an ancient lake, the salt crust sits atop an aquifer that helps cool tires. The 10-mile straightaway demands low friction and precise preparation. Drivers start runs just after sunrise to dodge midday heat that can soften the crust. Spectators stand a quarter mile back, peering through binoculars. The setting has hosted records since the 1930s and appeared in films from “The World’s Fastest Indian” to the finale of “Mad Men.”
Yet the flats also carry danger. One year ago racer Chris Raschke died after losing control of the rocket-powered Speed Demon during Speed Week. Green knew the stakes. “We’re managing the risks very carefully,” he said. Months of simulator work and track testing preceded the record runs. He learned engine synchronization, parachute deployment for slowing, and how the car behaves when the hydrogen burns hottest. The parachute proved essential. Even at these speeds the salt offers limited grip.
Recent coverage highlights the engineering leap. Forbes noted the Hydromax also exceeds the 303 mph record for hydrogen fuel-cell vehicles, claiming the title of fastest hydrogen-powered vehicle of any type. Interesting Engineering reported the provisional record on the same day, underscoring how excavator-derived powerplants scaled to extreme performance. The New York Post described the car as a “supercar” in tubular form, reaching the mark on Tuesday.
Green’s background prepared him well. A former fighter pilot accustomed to supersonic flight, he answered a newspaper ad in the 1990s seeking a high-speed driver. The Thrust SSC project consumed years. This time JCB pulled him from retirement. The collaboration pairs decades of his experience with the company’s determination to validate hydrogen for heavy industry. Bamford has long argued that batteries struggle with the torque and runtime demands of large equipment. Hydrogen, he contends, offers a practical path.
Still, hydrogen’s cleanliness depends on its source. Most global production today comes from fossil fuels. JCB secured supplies of green hydrogen generated through renewable electricity. That choice shrinks the carbon footprint but highlights how small the green fraction remains worldwide. Safety adds another layer. Hydrogen’s flammability and high-pressure storage require meticulous handling. The team addressed those concerns through extensive ground tests before any high-speed pass.
The record lands at a moment when industries hunt realistic decarbonization routes. Construction machinery, aviation, and shipping share traits that challenge pure battery solutions: high energy density needs, rapid refueling expectations, and tolerance for harsh environments. JCB’s demonstration shows hydrogen internal combustion can deliver serious power without tailpipe CO2. Whether the approach scales commercially will depend on infrastructure, cost, and continued engineering refinement. For now the salt flats offer proof of concept at blistering velocity.
Green downplayed drama after the run. “What the peak speed is, I can’t say. We just don’t know. Part of the adventure here is we’re going to find out.” That mindset echoes through his career. From breaking the sound barrier to rewriting the hydrogen rulebook, he treats each record as data rather than destination. The Hydromax’s performance supplies plenty of data. Engineers will dissect every sensor log, tire mark, and combustion event.
Back in 2006 Green set the diesel land speed mark at 350.092 mph on these same flats. Tuesday’s 406.320 mph run erases that personal best in decisive fashion while opening an entirely new category. The margin over the old hydrogen record exceeds 220 mph. Such gaps rarely appear at the top of motorsport. They signal how immature the hydrogen combustion class had been until this project arrived.
Industry watchers note the transferability. Lessons from the 1,600-horsepower twin-engine setup could influence future heavy equipment designs. If a 32-foot streamliner can sustain those speeds on salt, then perhaps a loader or excavator can run all day on hydrogen with lower emissions. JCB clearly hopes the publicity accelerates adoption. The record provides marketing power alongside technical validation.
Of course, records invite challengers. Other teams may now target the hydrogen combustion benchmark with their own designs. Fuel-cell advocates will point to their separate record, though the Hydromax surpassed it too. Electric vehicle efforts continue pushing past 341 mph. The competition sharpens focus across powertrain types. Bonneville has long served as neutral ground for such contests.
Green, for his part, seems content. The man who once produced sonic booms now champions a quieter, cleaner alternative. He broke the sound barrier. Then he broke his diesel record. Now he has established hydrogen’s high-water mark. Each milestone built on preparation, courage, and engineering that refused easy answers. The salt flats keep their secrets until someone fast enough arrives to claim them. On this August morning, Andy Green claimed another.