What does small displacement mean?

[Rose]

Small-displacement cars generally refer to "mini cars" with a displacement of around 1.0 liters, and their fuel consumption is basically below 5 liters per 100 kilometers. Advantages of small-displacement cars: Energy-saving: The fuel consumption of small-displacement cars is basically below 6 liters per 100 kilometers. Compared with family economy cars with a general displacement below 1.4 liters, they can save 3-4 liters of fuel per 100 kilometers, with significant social benefits. Environmental protection: Air quality monitoring in China's urban environments shows that 70% of cities fail to meet air quality standards. With the rapid increase in urban motor vehicle ownership, motor vehicle exhaust emissions have become the main source of air pollution in many cities. The relationship between small-displacement cars and fuel consumption: Regardless of the displacement, the best working speed for an engine is generally around 2000 rpm. For small-displacement engines, the maximum speed in urban driving can reach 40-60 km/h, so the rpm will not be too high. However, under high-speed driving conditions, the rpm can reach 3500 at speeds above 100 km/h, and 4000 rpm at speeds above 120 km/h, or even 4500 rpm. High-speed driving will definitely lead to higher fuel consumption. For example, my F0 consumes about 6L in slow urban driving, but it will be above 7-8L on the highway, so it is not fuel-saving.