What makes a diesel engine different to a regular gas engine, and is one better than the other?

In 1673, Christian Huygens invented the first engine. It was designed to pump water from the Seine River to King Louis XIV's Palace of Versailles. Built with an open combustion chamber, it consumed ...

Despite sounding like a thoroughly entertaining evening out, it is actually a description for one of the most important processes in the majority of engines. Known as the four-cycle, it is the process ...

While a lot of automotive engines have one spark plug per cylinder, the HEMI V8 might have two per cylinder. What is the ...