At first glance, the concept of engine compression is simple enough:It's the ratio of the volume of the combustion chamber and bore when thepiston is at bottom dead center (BDC) versus when it is at ...

The FIA has launched an e-vote with the power unit manufacturers, aimed at introducing a new compression ratio methodology from August 1. The governing body has confirmed the nature of the proposed ...

Tucker Ryals;Gainesville, FL: I'd like to pose a question regarding an article Jeff Smith wrote on the Chevy 5.3L motor "Bolt On a Cam and Heads and Add 120+ HP" (April '08). I read the article with ...

A computer generated power stroke of an internal combustion engine, following ignition - Pathompong Thongsan/Getty Images When comparing engine specs for nearly any combustion engine automobile, we ...

The FIA have announced changes to Formula 1's power unit regulations, most notably surrounding compression ratio, which have caused controversy over the winter. When the 2026 power unit regulations ...

Let’s clarify the numbers: the current Formula 1 regulations allow an internal combustion engine compression ratio of 16:1 measured at ambient temperature. All power units checked in Australia were ...

A hot-temperature compression ratio test is one solution set to be tabled at an upcoming meeting of the power unit advisory committee. The matter of compression ratio measurements in the new F1 2026 ...

Hamilton addresses rumors of Mercedes’ technical advantage after day one of preseason Bahrain testing. Concerns raised about Mercedes’ fuel loads, engine modes, and possible compression ratio edge.