What does Audi 4045 mean?

[VanElias]

Audi's 40 and 45 at the rear represent the engine displacement. Introduction to car displacement: Displacement, a specialized term in hydraulic transmission, refers to the volume of fluid inhaled or discharged per stroke or cycle. Car displacement is an important parameter for measuring a vehicle. Some domestic cars do not have the above-mentioned car model at the rear, but their displacement is generally indicated on the body or rear of the car. Displacement and cars: The space volume that the piston moves from the top dead center to the bottom dead center is called the cylinder displacement; if the engine has several cylinders, the sum of the working volumes of all cylinders is called the engine displacement. It is generally expressed in liters (L). Engine displacement is one of the most important structural parameters, and it represents the size of the engine more than the cylinder diameter and the number of cylinders. Many indicators of the engine are closely related to the displacement.