The incident happened outside The Ifor Hael Hotel in Llwynypia, Tonypandy, on Thursday at 23:15 BST.
Police are appealing for the driver and any occupants of a small hatchback car to come forward.
The road was closed overnight for five hours while investigations took place.
A 49-year-old man has died after being hit by a car which failed to stop, South Wales Police has said.