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.

What exactly is Spark Controlled Compression Ignition? SpCCI is a natural progression of Mazda’s Skyactiv programme, which it embarked on in 2011 when it launched petrol and diesel engines ...

A fundamental difference between gasoline and diesel engines is that a gasoline engine uses spark ignition while a diesel engine uses compression ignition. Before we delve deeper, let's understand ...

Mazda’s new SkyActiv-X engine will go against every convention you thought you understood about gasoline engines. It’s supercharged, but for efficiency purposes, not to increase power. It has ...

Mazda's compression gasoline engine is promised to deliver 10 to 30 percent greater torque numbers than SKYACTIV-G engines, with Mazda planning to pair the new design with a supercharger.

Mazda’s powertrain team has brewed up a fancy new engine that, like a diesel, uses compression to activate the combustion process. In a press release on the new tech, Mazda tells us just how ...

Dubbed the HCCI (or Homogenous Charge Compression Ignition) engine, GM's experimental powerplant works on a phenomenon which normally spells mechanical doom for conventional petrol motors.

Why the fuss? Because it combines spark ignition and compression combustion in a petrol engine for the first time. It was first shown in 2018.