What is the unit of displacement?

[Jill]

The unit of displacement is "liter". The total working volume of a cylinder is the sum of the cylinder's working volume and the combustion chamber volume, usually measured in "liters". The sum of the working volumes of all cylinders in an engine is the total displacement of that engine (i.e., displacement). Currently, the main unit of displacement is "liter" (L), and there is also "milliliter" (ml, 1 liter = 1000 milliliters), which can also be expressed as "CC". Displacement classification: In China, the classification of cars is based on displacement size. Cars with a displacement of 1.0L or less are classified as micro cars; those with a displacement between 1.01.6L are classified as standard cars; those between 1.62.5L are mid-size cars; those between 2.5~4.0L are upper-mid-size cars; and luxury cars have a displacement greater than 4.0L. Significance: Generally, a larger displacement means the engine releases more energy (converting chemical energy from fuel into mechanical energy) per unit time, which translates to better "power performance". SUVs and sports cars usually have relatively larger displacements.

[ODakota]

The most commonly used unit for displacement is liters (L). For example, when we refer to 1.5T or 2.0L, it indicates the total engine volume. One liter equals 1000 milliliters, and sometimes cubic centimeters (cm³) are also used, such as a motorcycle with 125cc displacement, which is actually 0.125 liters. The larger this number, the more air-fuel mixture the engine can intake per cycle, and generally, the more powerful it is. However, small-displacement turbocharged engines are very popular now, and a 1.5T car can deliver comparable power to older 2.0L models, showcasing significant technological advancements.

[LoganDella]

When repairing cars, I most commonly use liters (L) as the unit to measure displacement, and occasionally come across older materials that use cubic centimeters. The conversion is quite simple—1600cc equals 1.6 liters. Displacement is directly related to engine power output. Back when working on carburetor cars, larger displacements required extra care when adjusting the air-fuel mixture. Nowadays, manufacturers label things more standardized—numbers like 380TSI on the rear of cars actually indicate torque, not displacement, so don’t get them confused.

[OLaura]

The unit of engine displacement is mainly liters (L), and the total displacement is the sum of the working volumes of all cylinders. For example, my off-road vehicle is labeled as 3.0L, which means the total volume of all cylinders is three liters. This number is usually displayed on the rear bumper and is an important parameter when buying a car. However, the displacement labeling for hybrid vehicles is a bit special now. For instance, some 2.0L plug-in hybrid vehicles actually have performance equivalent to a 3.0L fuel-powered car.