Repa - Rim
- Repair
- Repair gang
- Repair kit
- Repair manual
- Repair pit
- Repair post
- Repair shop
- Replacement engine
- Reserve tank
- Reserved road
- Residues of combustion
- Resistance
- Resistance welding
- Retainer (retaining spring)
- Retaining ring
- Retarded ignition
- Retarder
- Retarted injection
- Retreaded tyre
- Rev-counter (revolution counter)
- Reverse movement
- Reverse rod
- Reverse scavenging
- Reversed clutch
- Reversing gear; reverse gear
- Reversing lamp
- Revolution
- Revolution counter
- Revolution per minute
- Ribbed radiator
- Ribs
- Rich mixture
- Ride clearance
- Right of way
- Right-hand drive
- Right-hand thread
- Rigid coupling
- Rim
