R class
- British R-class submarine
- Italian R-class submarine
- LCDR R class
- Mercedes-Benz R-Class
- Model R (disambiguation)
- NER Class R
- NZR R class
- Pierre Radisson-class icebreaker
- Q and R-class destroyer
- R (disambiguation)
- R-class Melbourne tram
- R-class Sydney tram
- R-class cruise ship
- R-class destroyer (1916)
- R-class patrol boat
- R1-class Sydney tram
- Rainbow-class submarine
- Revenge-class battleship
- Rhymney Railway R class
- Type R (disambiguation)
- United States R-class submarine
- Victorian Railways R class