Quote Originally Posted by archie2000
i completely understand
anyways back to my question.
are 4 drill motors more powerful than 2 speed 900s?
If you would have understood, you wouldn't have asked this question.

I'll try again.

Depends on drills. Some drills -on paper- will draw more power, meaning those are more powerfull.

On the other hand, motors have a few things that make them better or not.

As a rule, bigger diameter and/or stronger magnets equals more torque for a given volt/amp draw. But a lower RPM per volt.
A speed 900 has a diameter of 50mm+, a cheap brand of drill will have a motordiameter of 36mm. Just to demonstrate. A 900 weights 660 grams+, a cheap drillmotor with gearbox weights less than 600 grams.

Build quality is another matter. You can imagine a £12 drill will have less quality materials than a simular sized drill from a quality brand.

And of course, you can use the most powerfull motors in a machine, but if the shape is wrong, it doesn't matter.
A robot with Bosch 35 drives getting under will outperform a 6 Speed 900 propelled monster.