Why does the car's power drop significantly when the air conditioning is turned on?

[Lucian]

When the air conditioning is turned on, the air conditioning compressor consumes a portion of the engine's torque during operation. If the engine's output torque is small, the proportion of torque consumed by the air conditioning compressor is relatively large, which can make the driver feel a lack of acceleration. Here is some relevant information: 1. Reasons for the impact: During daily driving, especially at low speeds, the actual power of small-displacement cars is around 30 kilowatts, so the effect of the car's air conditioning is quite noticeable. However, for larger-displacement models, the impact of the air conditioning may be less obvious because larger-displacement engines have more power, and even at low speeds, they output stronger power. 2. Reasons for the power reduction: In the current design of household cars, the power of the car's air conditioning compressor comes directly from the engine, so the power available for driving the vehicle decreases, resulting in a reduction in power.