F1 "power units" are at 47% thermal efficiency but there a complicated hybrid system. https://www.formula1.com/content/fom-website/en/latest/interviews/2016/2/

F1 "power units" are at 47% thermal efficiency but there a complicated hybrid system. https://www.formula1.com/content/fom-website/en/latest/interviews/2016/2/mercedes_-andy-cowell-on-more-power--more-noise-and-more-races.html https://www.formula1.com/content/fom-website/en/latest/inter...