Not an issue with my car but my neighbor's. He has I believe he said a
> '92 Camry and said that whenever they turn on the A/C running down the
> road, the engine dies immediately. Runs fine otherwise. If they turn
> off the A/C car runs fine again.
>
> What would cause this?
I think you have identified the problem. Compressor is seized up. It really doesn't have to be fixed if your neighbor can live without air conditioning. Just don't turn it on.