All right, I think this thread needs to get back on topic.

The A/C in your SVX will always rob your "power". If you look at the drive belts on the front of your wonderful little EG33 block, you will see that one goes to the power steering and alternator, and the other goes to the A/C compressor. Both of these belts originate from the crankshaft pulley.

When you turn on your A/C, the compressor starts doing its thang. This places resistance on the belt that's driving it, thereby putting resistance on the pulley that drives the belt. This obviously makes it more difficult for your pistons to drive the crank.

And since it is more difficult for your pistons to drive the crank, you notice it and start to press on the throttle more. This increases the quantity of fuel that your car consumes in order to increase the combustion rate, effectively giving you the perception that your car is now performing the way it should be: Just like when the A/C is off.

So, yes. A/C does rob your SVX of some "power" and also increases fuel consumption (both from you pressing the throttle more, and from your engine's natural reaction to another accessory being turned).