The plastic cover of a Subaru Boxer engine showing the Subaru constellation logo - Topuria Design/Shutterstock Flat engines are horizontally-opposed piston engines, and this group includes Boxer ...

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.

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 ...

Subaru is a brand that's known to do things a bit differently than other mainstream car manufacturers. All but one of its cars come with standard all-wheel-drive, it has a historic commitment to ...

It takes serious skill to slice an iconic flat-four motor in half and completely rebuild it. See how these mechanics pull off ...