R25 may refer to:

Automobiles BMW R25, a German motorcycle Renault 25, a French executive car Renault R25, a Formula One car Yamaha YZF-R25, a Japanese motorcycle

Aviation British Airship R25, a training airship Rubik R-25 Mokány, a Hungarian glider Tumansky R-25, a Soviet turbojet engine

Roads R-25 regional road (Montenegro) R25 (South Africa)

Other uses R25 (London), a proposed railway orbital in Greater London R25: Toxic if swallowed, a risk phrase R-25 Vulkan, a Yugoslav surface-to-air missile , a destroyer of the Royal Navy Remington Model R-25, a semi-automatic rifle , a submarine of the United States Navy