Formula 1 cars have some excellent thermal efficiency, with even the best mainstream cars just scraping under their potential ...

A modern Formula 1 power unit squeezes more useful work from a liter of fuel than any production car on the planet.

Mazda’s Skyactiv-X compression ignition engine is pushing the limits of what is possible with a mass-market automobile engine, but the Japanese automaker evidently believes HCCI is but the beginning.

Geely unveils a hybrid engine with 48.4% thermal efficiency and 105 mpg, setting a new benchmark for production powertrain ...

Nissan isn’t giving up on the internal combustion engine just yet and has confirmed it can create an engine with a thermal efficiency of 50 per cent. A typical production engine has a thermal ...