The compression ratio isn’t just a number: it’s one of the greatest determining factors in engine building. Compression ratio determines the type of fuel, how much boost, and has a significant ...

How do you calculate a compression ratio, and what’s the ideal number for your build? Let’s find out.

Variable Compression Ratio Engines have been some sort of a Holy Grail, and now Porsche proposes a viable solution for this ...

Read the tech article on an Engine Compression Guide, brought to you by the experts at Chevy High Performance Magazine.

The new Infiniti VC-Turbo engine (code-named KR20) is chock-full of interesting details that come with its variable-compression-ratio trick.

We explore why a higher compression ratio means more power for your hot rod, and explain what to do to maximize that bump in power.

Increasing an engine’s compression ratio is a proven way of unlocking extra horsepower, but there’s a point of diminishing returns. The team at Garage 54, the Russian mechanics who built a V16 ...

The automaker has revealed plans to introduce the first production-ready engine with a variable compression ratio that promises to improve efficiency dramatically.

Mazda‘s upcoming SkyActiv-G engines will get a 14:1 compression ratio, the highest in the world for a gasoline engine, according to a report in Autoweek.Most cars run compression ratios of 8.5:1 ...

Why variable compression ratio matters Today's gasoline-engine cars compress the outside air to about a tenth its original volume, a 10:1 ratio, inside each cylinder.