What is the relationship between a car's fuel consumption and its engine displacement?

[AllisonMarie]

Engine displacement affects fuel consumption, but it is not the decisive factor. Generally speaking, the larger the displacement, the higher the fuel consumption per 100 kilometers. However, a high fuel consumption does not necessarily mean a large displacement. In a relative sense, the size of a car's engine displacement does not form a direct proportional relationship with fuel consumption. In addition to engine displacement, factors such as the car's shape, weight, and engine technology are also important factors affecting fuel consumption. More details are as follows: 1. General situation: Generally speaking, the larger the displacement, the higher the fuel consumption per 100 kilometers. However, there cannot be a formula between the two, at least the driver's control cannot be formulated. 2. Factors that can serve as relatively significant references for fuel consumption: displacement; curb weight; gross vehicle weight; actual engine operating conditions (speed, output torque); road conditions can be reflected through the engine's real-time parameters.