The guys at Muscle Car Review show you how to check engine compression with the latest tools. Check it out only at hotrod.com or the October 2011 issue of Muscle Car Review Magazine.

You’ve heard the term compression ratio before, but have you ever wondered exactly what it means? Well, it’s time to explain exactly what compression ratio is, and why every carmaker is now ...

A high compression ratio means you're squeezing tightly on the air-fuel mixture in the engine's combustion chambers, which in turn means more power and fuel efficiency.

Answer:The compression ratio listed for any engine combo is always the static compression ratio, which is fixed via component selection and machining practice when the engine is built. As you've ...

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

Static compression is what engineers, engine builders, and even do-it-yourselfers dial in to an engine build. Basically, it's the exact compression ratio formulated into engine construction in a ...

Around 2001, Saab Automobile introduced a bold new engine concept that used a hinged, two-part engine block to vary the compression ratio automatically.

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.

Here's a fascinating example: Infiniti is about to unveil the world's first production-ready variable compression ratio engine at this year's Paris Motor Show.

CHECK OUT: Audi looks back at 40 years of 5-cylinder engines When you want power, the compression ratio drops and the turbocharger makes use of more boost.