The size and shape of the pump says me Size 1 gearpump, up to 8 cc per revolution.

I go from the medium size 4 cc.
Now a bosch runs about 2500 rpm with a reasonable power

4*2500= 10L/minute displacement

Basic formula

pressure (in bar)*flow(liter-minute) /500= KW needed
10*200/500=4Kw
To much for a bosch. RPM will drop more more amps will be used and the bosch will overheat.

Solutions.
Use bigger motors with a suitable RPM range. Disadvantage, weight and/or efficiency.

Use a smaller pump. 1.5 CC is the top for a Bosch 750. Disadvantage. Pricetag.

Use a gearing. Lowering the flow, but making the pump useable on a more affordable motor/battery configuration. A 4/1 gearing sounds fine to me to make that pump and bosch combo useable.
Disadvantage, time, weight, size and price.