Nissan brought the first, and only, variable-compression engine to market. But its future doesn't look bright. Complexity in cars is a funny thing. It’s tempting to say that it’s all bad, that more is ...

Nissan’s original variable-compression powerplant is an absolute marvel of engineering. This little four-cylinder wonder is not only potent, delivering 268 horsepower and 280 pound-feet of ...

A gasoline piston engine that can dynamically change its compression ratio —that is, the amount by which the piston squeezes the fuel-air mixture in the cylinder—has long been a holy grail of engine ...