Most friends seem to have this understanding: that is, the larger the displacement of a car, the more fuel it consumes, and this understanding has reached a deep-rooted level. So is everyone’s intuitive understanding correct? Do cars with larger displacements really consume more fuel? Today Lun Gu is discussing this issue, hoping to express scientific and testable conclusions so that everyone can have a new understanding of this issue and avoid being one-sided.

What is car displacement?

Before talking about the relationship between car displacement and fuel consumption, I still need to tell you what car displacement is. After all, many friends often say the word "displacement", but, In fact, he didn't know what "displacement" meant.

Displacement is the total volume of all cylinders of the engine

Displacement refers to the movement of the piston from top dead center to bottom dead center, and the working volume passed is called cylinder displacement. If the engine has several cylinders, the sum of the working volumes of all cylinders is called the engine displacement.

In layman's terms, it is the total volume of all cylinders of the engine, generally expressed in liters (L).

What is car fuel consumption?

I don’t need to explain the fuel consumption. Everyone knows that it is the amount of fuel consumed by a car for a certain mileage. The fuel consumption per 100 kilometers of a certain car that we usually talk about is xxL for this car. Fuel consumption.

Does a larger displacement really consume more fuel?

I can give a conclusion first, and I will tell you the details slowly below: There is a certain relationship between displacement and fuel consumption, but a greater fuel consumption does not necessarily mean a greater displacement. In a relative sense, the size of a car's displacement is not directly proportional to its fuel consumption.

There are a few cars with large displacement and low fuel consumption

We cannot simply say that cars with larger displacement consume more fuel, because there are indeed a few cars with large displacement and low fuel consumption. Low car.

This is like saying, you can’t simply say: the bigger the meal, the fatter the person. There are still many people who clearly eat a lot, but they don’t get fat and are still very thin. You are angry. People don't. But generally speaking, there are more fat people with big appetites.

The models in the above table are all large-displacement models equipped with six-cylinder engines, and their actual fuel consumption performance is quite amazing. From the above data, we can see that larger displacement does not necessarily mean more fuel consumption.

Vehicle fuel consumption is affected by many factors

Vehicle fuel consumption is related to too many factors, and displacement is only one of them.

Car fuel consumption is also related to car weight, aerodynamic design, mechanical efficiency, engine technology, driving habits, road conditions, etc.

This is like saying that a person's obesity is not only because he eats a lot, but also has many other influencing factors, such as not exercising, often staying up late, often eating greasy food, etc.

As for the influencing factors of fuel consumption, I will not carry out the analysis here. It is good that everyone knows this conclusion. After all, I am just giving you a brief explanation of this issue. There is no need to use a lot of professional terms. You can see It should be easy to understand. If you like my style, please give me a thumbs up.

So we use a scientific and rigorous attitude: when a series of conditions such as vehicle weight, aerodynamic design, mechanical efficiency, engine technology, driving habits, road conditions, etc. are the same, the displacement The bigger the car, the higher the fuel consumption.

Rungu summary:

If we just say roughly, in general, the larger the displacement, the higher the fuel consumption, then it is true. But speaking scientifically and rigorously, we cannot simply say that a car with a larger displacement consumes more fuel, because there are indeed a few cars with a large displacement and low fuel consumption.

In fact, car fuel consumption is affected by many factors. As long as you have proper driving skills and good road conditions, you can drive a large-displacement car with low fuel consumption. Therefore, when we see other people’s cars with larger displacements than our own, we should not mindlessly complain that their fuel consumption is higher than ours.

This article comes from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.