Cros - Dash
- Cross flow (crossflow)
- Cross-country vehicle
- Cross-fall
- Cross-flow scavenging
- Crossmember
- Crossply tyre
- Crown
- Crown wheel
- Cruise control
- Cruiser
- Cruising range
- Cruising speed
- Cubic capacity
- Curduroy road
- Current regulator
- Custom car
- Customs pass
- Cut-out
- Cycle
- Cycle-car
- Cyclometer
- Cylinder
- Cylinder block
- Cylinder bore
- Cylinder boring
- Cylinder boring machine
- Cylinder capacity
- Cylinder grinding
- Cylinder grinding machine (cylinder grinder)
- Cylinder head
- Cylinder honing
- Cylinder honing machine
- Cylinder liner (sleeve)
- Cylinder port
- Cylinder pressure
- Cylinder-head cover
- Cylinder-head gasket
- Damper
