Chart below based on measurements at 13.96V for the DC motors and from source websites and/or datasheets for the other motors.

FTC DC Motor Comparison and Test Report, from tests run in October 2014.

Comparison of Motors in spreadsheet form
        Speed and Torque capabilities of different motors used in FTC

              AndyMark NeverRest Motor Testing Report
              The above datasheet may use extrapolated values for the torque/speed curve!
              Given this, the stall torque and peak power estimates are suspect.