Here's how the radical new engine concept is designed to work. This is basically a four-cylinder, opposed-piston engine, similar in basic concept to the EcoMotors OPOC and Achates Power opposed ...

The 4-cylinder engine has become a standard across the ... A flat engine, often referred to as a "boxer" because of its horizontally opposed pistons resembling two boxers going at it, has another ...

A 4-cylinder car is a car powered by an engine with four pistons, arranged almost exclusively in an inline configuration as opposed to other common engine layouts. These days, 4-cylinder cars make ...

Inline-4 engines are frequently fitted with counter ... 4s which only require a single cylinder head, horizontally opposed four-cylinder engines require two separate cylinder heads, which adds ...

Flathead designs gave way to overhead valves, and inline cylinder arrangements morphed into V-shaped or horizontally-opposed ... 4.2-liter inline-six-cylinder Vortec 4200 to Toyota's 2JZ engine ...