Liquid Hydrogen Combustion Engine!
Toyota surprised me once again, announcing they’ve raced with liquid nitrogen in the Fuji 24 Hour race, accomplishing what they claim is the first for any manufacturer. No one has raced with liquid hydrogen! The technology is awesome, as it allows for a lot more hydrogen storage versus gaseous hydrogen (stored at 700 bar). Here, the low pressure liquid must be kept at -253ºC, however, which is quite a challenge.
Credit Engineering Explained