Every new internal combustion car and truck sold in America today is equipped with a four-stroke engine, as are the vast ...

The two-stroke gasoline engine was once a marvel of engineering, offering up huge doses of power in small and lightweight ...

The free piston engine, a design with opposed pistons working against compressed air springs and combining both compression and firing strokes in a single axis, doesn’t turn anything in itself ...

In four-stroke engines, the air and fuel mixture only takes up the area of the cylinder above the piston, while in two-stroke engines, the mixture is present above and below the piston.

Every internal combustion engine needs oil for lubrication, but two-stroke engines take their oil regularly along with gasoline.

There are two basic differences between 2 stroke and 4 stroke motors. One has to do with how many strokes it takes a piston to complete an engine cycle (more on that below).

Two-stroke engines are generally more powerful for their package size and more thermodynamically efficient than four-stroke engines.

The best comparison of a 2 stroke vs 4 stroke motor considers the factors you personally care about, like cost, maintenance, and gas mileage.

Porsche 6-stroke engine patent image In this context, "stroke" refers to the up-and-down movement of an engine's piston within the cylinder.

Rex, the engine of the future that may reach the American engine market in the next years. This is everything we know about ...

Porsche has filed patent documents with the U.S. government for a six-stroke internal combustion engine.

INNengine's half-liter opposed-piston engine makes 120 horsepower in an ultra-compact, super-efficient package.