There's no standard definition of a "liters mean car motor." The term "liters" in the context of a car engine refers to the
engine displacement. Engine displacement is the total volume of all the cylinders in the engine. A larger displacement generally means a more powerful engine, but other factors like design and efficiency also play a significant role in power output.
So, a "3-liter engine" means the combined volume of all its cylinders is 3 liters. There's no inherent "mean" aspect to the term; it just describes the size of the engine.
