Uncover the fascinating story of the saab variable compression engine, a groundbreaking design that never made it to ...

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 ...

Taking an engine compression test is sort of like checking your car's blood pressure. It's a quick and painless procedure that can reveal hidden issues.

As you may know, an engine's compression ratio is directly linked to its combustion efficiency. All else being equal, higher-compression engines tend to make more power while offering better fuel ...

With every passing day the Mule provides opportunities beyond our original expectations. Since the 467ci engine belongs to HPP editor Tom DeMauro, it is at our beck and call. This affords HPP the ...

A.Here's a pressure-volume diagram for a combustion engine. Although rough, it is an approximation of the so-called air-standard cycle. '' Point (a) is at atmospheric pressure, after which the air is ...

The same solution for very different reasons.

Nissan’s variable compression engines have caught the attention of U.S. safety regulators, following multiple reports of alleged engine failure, loss of power, engine knocking, and metal chunks and ...

Nissan's innovative variable compression engines were a fascinating innovation when they were first revealed, but the jury is still out on whether or not the combustion technology will stick around. A ...