What does a displacement of 1.5L mean?

[Dorothy]

L stands for a naturally aspirated engine, and 1.5L represents a naturally aspirated engine with a displacement of 1.5 liters. T stands for a turbocharged engine, and 1.5T indicates a turbocharged engine with a displacement of 1.5 liters. Naturally aspirated engine: This is one type of air intake method for vehicles, where air is drawn into the combustion chamber by atmospheric pressure without the use of any supercharger, providing power support for the vehicle. Turbocharged engine: Turbocharging is a technology that uses the exhaust gases produced by internal combustion engine operation to drive an air compressor. The main purpose of turbocharging is to increase the engine's air intake, thereby enhancing the engine's power and torque, giving the vehicle more robust performance. When a turbocharger is installed on an engine, its maximum power can increase by at least 40% compared to when no turbocharger is installed. When a vehicle's engine operates at low speeds, the turbocharging system is usually inactive. At this point, the power output of a turbocharged engine is essentially no different from that of a small-displacement naturally aspirated engine. However, when compared to a naturally aspirated engine with the same maximum power, the naturally aspirated engine will exhibit superior power performance.