The internal combustion engine, for all its mechanical sophistication, still runs on a 19th-century mechanical idea: pistons rising and falling, a crankshaft spinning, a steam-age architecture ...

There are a lot of strange automotive designs out there, but this defunct engine from the '70s may just be the weirdest one ...

Throughout motorcycle history, there have always been builders who try to push the envelope and do something different. Countless designers have been drawn by the allure of diesel engines and Wankel ...

When most people hear the term "rotary engine," they probably think of Mazda first, as rotary engines have been part and parcel of the Japanese automaker's mantra for decades. In fact, Mazda proclaims ...