Toyota (in collaboration with Yamaha) is developing a V8 hydrogen combustion engine [1]. BMW also developed a V12 hydrogen combustion engine back in 2005 [2].

Toyota (in collaboration with Yamaha) is developing a V8 hydrogen combustion engine [1]. BMW also developed a V12 hydrogen combustion engine back in 2005 [2]. "Engineering Explained" has put out videos on both, and neither of them sound very appealing to me. [3][4] [1] https://www.topgear.com/car-news/future-tech/toyota-and-yamaha-are-developing-hydrogen-fuelled-v8 https://www.topgear.com/car-news/future-tech/toyota-and-yama... [2] https://en.wikipedia.org/wiki/BMW_Hydrogen_7 https://en.wikipedia.org/wiki/BMW_Hydrogen_7 [3] https://www.youtube.com/watch?v=vJjKwSF9gT8 https://www.youtube.com/watch?v=vJjKwSF9gT8 [4] https://www.youtube.com/watch?v=AouW9_jyZck https://www.youtube.com/watch?v=AouW9_jyZck