R5

R5 may refer to:

Roads or railroads

 * Autopista Radial R-5, a Spanish radial motorway
 * R5 (RER Vaud), an S-Bahn line in the canton of Vaud
 * R5 expressway (Slovakia)
 * R5 road (Zimbabwe), a road connecting Harare with Mutare
 * Radial Road 5 or R-5, an arterial road of Manila, Philippines
 * Line R5, a commuter rail service on the Llobregat–Anoia Line, in Barcelona, Catalonia, Spain
 * R5 Doylestown, a rail line in Philadelphia, USA
 * R5 Paoli-Thorndale, a rail line in Philadelphia, USA

Ships

 * HMS Invincible (R05), a 1980 British Royal Navy light aircraft carrier
 * HMS Urania (R05), a World War II British Royal Navy U-class destroyer
 * USS R-5 (SS-82), a 1918 R-class coastal and harbor defense submarine of the United States Navy

Cars

 * Jaguar R5, a Jaguar Racing car for the 2004 Formula One season
 * Renault 5, a French automobile
 * R5 (rallying) a class within Group R regulations for rallying

Aircraft

 * Kinner R-5, a popular engine for light general and sport aircraft
 * Polikarpov R-5, a reconnaissance biplane widespread in the Soviet Union before World War II
 * Sikorsky R-5, an early USAF designation of Sikorsky S-51 helicopter, changed to H-5
 * Thomas-Morse R-5, a 1920s American racing aircraft

Buildings

 * Regjeringskvartalet, a building in the Norwegian Government quarter (Norw. Regjeringskvartalet)

Weapons

 * R5 assault rifle, a variant of the South African R4 assault rifle compact carbine
 * R-5 Pobeda, a theatre ballistic missile developed by the Soviet Union during the Cold War

Medicine and chemistry

 * R5 virus, a form of HIV tropism
 * ATC code R05 Cough and cold preparations, a subgroup of the Anatomical Therapeutic Chemical Classification System
 * Cough ICD-10
 * R5: Heating may cause an explosion, a risk phrase in chemistry
 * receptor 5, the fifth in line of a series of cellular receptors, generally at the end of an acronym

Other uses

 * R5 (band), an American pop-rock band
 * R5 (bootleg), a copy of a movie made with a telecine machine from an analog source
 * Region 5, the DVD region code for most of Africa, Asia, and the former Soviet Union
 * BBC Radio 5 Live, a British radio station
 * Jordan Aviation, IATA airline designator
 * Malta Air Charter, former IATA airline designator
 * R5 series of preferred numbers
 * Radeon R5, graphics processing units in the Radeon 200 series
 * a type of droid from Star Wars, such as R5-D4
 * R5 Hastings St, an express bus service in Metro Vancouver, British Columbia, Canada
 * Canon EOS R5, a Canon full-frame mirrorless interchangeable-lens camera