It would have been revolutionary: an internal combustion engine without oil. And it might have worked. But lots of real-world issues got in the way.

Over the roar from a 110-cc, two-cylinder engine, Pinnacle Engines founder James Cleeves (nicknamed Monty), pointed out a window in the block. “You can see the cylinder sleeve moving for the intake ...

From a 75 horsepower sub-1,000cc four-cylinder to a 986-hp, 8.3-liter V16 and nearly everything in between, one company may have built a wider range of powerplants than any other. But what's next? Are ...

In this video, we explore opposed piston engines, focusing on the Achates Power engine and the Asender engine. Opposed piston engines enhance the use of combustion energy by replacing the cylinder ...