The flat-four boxer engine design is well over 100 years old, but it's still going strong, with applications in a number of major modern models.

Small planes use boxer engines because they're lightweight, run smoothly, and have better cooling — all of which are crucial ...

The four-cylinder, horizontally opposed "Boxer" engine is so ubiquitous within Subaru that it's only been substantially redesigned once since 1966. At least, until today. Today, Subaru has taken ...

And in 2011 a senior Porsche exec confirmed that a four-cylinder engine with a horizontally-opposed ‘boxer’ design was in fact in the works.

Continental Motors was the world’s largest manufacturer of automotive engines during the 1920’s. Its earliest venture in aircraft engines during the mid-1920s was the radial type, but Continental only ...

An engine similar to this type powered Santos-Dumont's Demoiselle aircraft. Matthew B. Sellers, builder of the first Kentucky-manufactured aircraft, flew his first quadraplane from 1908 to 1913 ...

The 4-cylinder engine has become a standard across the automotive industry thanks to its compact size and efficiency. But, one variant of 4-cylinder engine doesn't rule.

Strange engine configurations that never reached production always makes for interesting reading. Here are our favorites.

The 15 million milestone was achieved 49 years after FHI developed the all-new horizontally-opposed water-cooled four-cylinder aluminum engine and adopted it in the Subaru 1000 compact passenger ...

It looks something like a typical horizontally-opposed engine, but each cylinder actually has two back-to-back pistons and combustion chambers, all of which is connected to a central driveshaft.

Despite having four cylinder banks, the INNengine (depending on its configuration) actually has eight pistons. This is because the engine is an opposed-piston motor, meaning that each piston’s ...

According to the manufacturer, Achates' opposed-piston engine also puts out about 10% less carbon dioxide emissions than a traditional four-stroke engine.