Flat engines are horizontally-opposed piston engines, and this group includes Boxer engines, but not opposed-piston engines like the Cummins 14.3L Advanced Combat Engine (ACE) designed to power tanks.

Out of all the internal combustion engines that have existed, the boxer engine has to be one of the most distinctive. Nothing else is quite like it, and it's somehow managed to survive to the present ...

If you've ever taken a closer look at small planes or seen one being maintained, you might have spotted something interesting under the hood. The engine layout is often wide and flat, and not stacked ...

Ever heard an air-cooled, flat-eight motor hitting its rev limiter? It could very well become your Porsche 911's next upgrade.

From the eyes of the casual observer, Porsche's entire identity is marked by the flat-6 engine. That's hardly surprising, as it's the engine configuration of choice for Porsche's most popular ...

Porsche recently teased the Mission S Concept ahead of its reveal scheduled for October 15. The carmaker has now dropped a ...