* Displacement (or engine capacity): This is the most common way to describe engine size. It refers to the total volume of all the cylinders in the engine. It's usually measured in liters (L) or cubic centimeters (cc) or cubic inches (cu in). You'll find this information on your vehicle's documentation, often on a sticker in the engine bay or the owner's manual.
* Horsepower (hp) or Kilowatts (kW): This measures the power output of the engine. While not a measure of *size*, it's often used colloquially to compare engines. A higher horsepower generally indicates a larger or more powerful engine, but it doesn't directly tell you the engine's displacement. You'll find this number in your vehicle's documentation as well.
To find the *size* of your engine, look for the displacement. This is the most accurate and universally understood way to specify an engine's physical size.
