The world's largest piston engine is the Wärtsilä RT-Flex96C inline-14 diesel, ... The engine stroke is a whopping 98.43 inches with a 37.8-inch bore; at bottom-dead center, ...

The large, two-stroke Springville Power engines not only run lean, Sartain added, they are also “dual-fuel” units, using 90 percent natural gas and 10 percent diesel fuel.

Read about two stroke engines and how they relate to hybrid cars in Sport Compact Car magazine. News. Reviews ... make a big, negative pressure wave hit the exhaust port while it's open, ...

The four-stroke engine has dominated internal combustion for more than a century, but a British engineering firm is ready to topple that technology with what it calls a 150-horsepower “five ...

And here is a chart from the Oregon State Marine Board about the way the ban cut the proportion of two-stroke outboard engines on the state’s waters from 70% to 51% in the first three years.