What is a 3 liter engine?

A 3-liter engine refers to an internal combustion engine with a total displacement of 3 liters. Displacement is the total volume of all the cylinders in the engine. This volume is swept by the pistons as they move from top dead center to bottom dead center. A larger displacement generally means more power, but also usually more fuel consumption. A 3-liter engine is a relatively common size, found in many cars, trucks, and boats.