M/C and calipers (simple question)

[boygenius]

OK I have been thinking about this. You could probably figure it out mathamaticly by determining the volume of fluid required to move the piston (s) the required distance to apply pressure on the rotor. Also take into account that the single piston calipers need to move the non piston side of the caliper also. I will try to work on some numbers tomorrow if I can. But in my own experiance (motorcycle) the 4 piston calipers require less lever travel than the sliding calipers.