A compressor makes airpressure by converting electricity.

For a certain amount of electricity you can make a certain airpressure in a certain amount.

Pressure in bar * flow in Liters per minute/500= Kilowatts needed.

I can imagine a car compressor, with a classical 540 size motor. Delivering 25A on 12V. That is .3Kw

so, 10 bar*X flow/500=0.3Kw .05*X=.3Kw X= 6L minute.

A 63*350 ram has a volume of about 1 liter. This means you have about 6 lifts a minute.
But then youll have to fill your buffertank. At least 3 liter. That takes 30 seconds to fill at the start of a fight. And only then you can achive a somewhat functional fast lifter or low power flipper.If you get the valves and tubes right.

Now, I experimented with car compressors. And one of the things they dont like at all is to be overvolted. They melt the hoses and gears.

If I would build a compressor powered flipper, I would rebuild a small 240V compressor (about ‚90) with a Bosch 750 or simular motor. But then you lose a lot of weight on this. 4 kg on the compressor 3.8kg on the motor, 1 kg on the connector/gearbox(a bosch 750 runs to fast on 24V) and then the batteryweight.

You dont have to take my advice, but I would say a short fat ram can deliver a better punch than a long thin one, even if the total calculated amount of energy is the same.