Almost all gasoline engines, whether they're efficient-yet-less-refined four-cylinders, high-horsepower V6s, or growly and torque-rich V8s, use much the same process to create power. The "Otto cycle" ...

The German automaker sees your four-stroke engine and raises you... two more strokes. Ready for some math? Porsche just patented an engine design titled: "Method for a Combustion Machine With Two ...