R8

R8 or R-8 may refer to:

Transport

Audi R8, used from 1999–2006 by Audi for Le Mans 24 Hours race cars, and from 2007–2024 for a street legal car
- List of Audi R8 automobiles
R8 (Rodalies de Catalunya), a commuter rail line bypassing Barcelona, Catalonia, Spain
R8 (SEPTA), a commuter rail line in Philadelphia, United States, which has been split into:
- Chestnut Hill West Line: (R8 Chestnut Hill West)
- Fox Chase Line: (R8 Fox Chase)
R8 (RER Vaud), an S-Bahn line in the Swiss canton of Vaud
Kyrgyzstan Airlines, from its IATA airline designators
Radial Road 8 or R-8, an arterial road of Manila, Philippines
Renault 8, a small family car produced in the 1960s and early 1970s
R8A (New York City Subway car)

R8 Machine taper, originally designed for Bridgeport Milling Machines
R8: Contact with combustible material may cause fire, a risk phrase in chemistry
HK R8, a modified version of the Heckler & Koch SL8 rifle
Smith & Wesson M&P R8, a .357 Magnum revolver
HP roman8, an 8-bit character set
Kaliningrad K-8, a medium-range air-to-air missile known as R-8 in service
Leica R8, a 1996 manual focus 35 mm single-lens reflex camera
Canon EOS R8, a mirrorless camera
Receptor 8, the eighth in line of a series of cellular receptors, generally at the end of an acronym
Roland R-8, a 1988 electronic drum machine
USS R-8 (SS-85), a 1919 United States Navy submarine
R8, sometimes used as text/SMS speak for "Reyt" (short for "Alright", or "Alreyt"), a term used in Northern England