four-speed

Short definition from Wiktionary

Noun

1. 1
   Having four forward speeds.
2. 2
   A transmission that has four forward speeds (it might or might not be a manual transmission); (metonymic) a vehicle with such a transmission.
3. 3
   A transmission that has four forward speeds (it might or might not be a manual transmission); (metonymic) a vehicle with such a transmission: A manual transmission with four forward speeds; (metonymic) a vehicle with such a transmission.