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 ...

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.

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 ...

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.

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.

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

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

This twin-charged four-cylinder engine includes a high compression ratio and multistage boosting enabled by the low-flow supercharger and high-flow turbocharger.

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.