From General Motors Corp.’s research shops last week came a torpedo-shaped car with a revolutionary new engine. Called the XP-50O, the car is powered by a 250-h.p. “free-piston” engine that many ...

As we move toward battery and hydrogen cell breakthroughs that could wean us off our addiction to oil, here’s at least one engine design from yesteryear that ought to be examined a bit more. The ...

Free-piston engine generators and linear machines represent an innovative departure from conventional rotary systems, offering high thermal efficiency and operational flexibility by eliminating the ...

Gasoline and diesel engines feature many differences aside from fuel type. Compared to gasoline engines, a diesel is typically a lower-revving, torquier design, hence why it's often preferred over ...

Ferrari continues to explore hydrogen-powered drivetrain solutions, patent documents discovered by AutoGuide.com indicate Ferrari is looking at a two-stroke 3- or 6-cylinder opposed piston engine ...

When we here in the modern age think of an “engine,” we are usually thinking of a four-stroke, four-cylinder, gasoline-fed, internal-combustion engine with the valves on the top. But why must that be ...