Why does my Miata bog down with the ac on?

When your Miata bogs down with the AC on, it’s likely due to the additional load the air conditioning system places on the engine. The AC compressor draws power from the engine, which can reduce overall performance, especially if the engine is not producing enough horsepower to handle both the vehicle's normal operation and the extra load. This effect can be more pronounced in lighter vehicles like the Miata, where power output is limited. To mitigate this, ensure your engine is in good condition and properly tuned, as well as check for any issues with the AC system itself.