Essentially, it’s a six-stroke engine that relies on a different stroke length for one of the strokes. The first three ...

GMC's huge Twin Six V12 gas engine was made to take on its diesel counterparts, powering fire trucks and farm machines, but it didn't stay on the market long.

Porsche may be signaling a shift in automotive engineering with recent patent filings for a six-stroke engine, hinting at the ...

Porsche has patented a revolutionary six-stroke internal combustion system. Contrast to all modern combustion engines that run the four-stroke Otto cycle that typically features one compression ...

Porsche has filed patents for an engine cycle with two combustion events for every six strokes (or three rotations of the crankshaft). They call it a 2 x 3-stroke. I’d humbly suggest it’s a 4 ...

Ford's 6.7-liter Power Stroke diesel V8 has been in service since 2011. It's one of the most reliable engines in Ford's stable and can last more than a million miles with regular care and maintenance.