British engineering company JCB has set a new world land speed record of 406.320 mph with its hydrogen-powered JCB Hydromax. The car recorded the average speed 400.623 mph in its first run this morning (11th August) across the Bonneville Salt Flats, and 412.135 mph on its second run, giving the average of 406.320 mph - the fastest a hydrogen internal combustion car has ever travelled. In doing so, JCB Hydromax surpassed the 350.092 mph world diesel land speed record set by JC