R31

R31 or R-31 may refer to:

Automobiles

• Nissan Pintara (R31), a compact car sold in Australia
• Nissan Skyline (R31), a mid-size car
• Renault R31, a Formula One racing car

Aviation

• R31 (airship), of the Royal Navy
• Renard R.31, a Belgian reconnaissance aircraft
• Rubik R-31 Dupla, a Hungarian training glider

Other uses

• R-31 (missile), a Soviet submarine-launched ballistic missile
• R31 (South Africa), a road
• Chlorofluoromethane, a refrigerant
• Grendel R31, an American semi-automatic carbine
• Herero language
• HMS Warrior (R31), an aircraft carrier of the Royal Navy
• R31: Contact with acids liberates toxic gas, a risk phrase