The best replacement for speed control is cruise control.

The best alternatives to speed control are rated as following:
★★★★★  cruise control
★★  torque control
★  light dimmer
★  dimmer
  flow control
  idle air control

Your alternative for speed control is not listed? Suggest!
Speaking about speed control, one probably shouldn't forget about motor.

Other search terms related to speed control and their ratings are:
★★★★★ motor
You have in mind a companion for speed control and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of speed control in all years. Click on graph for more.
speed control
cruise control
torque control