V42
V42 may refer to:
 Honda V42 Magna, a motorcycle
 ITU-T V.42, an error-correction protocol
 LFG V 42, a German sport aircraft
 Nissan Quest (V42), a minivan
 V-42 stiletto, a fighting knife
 Vanadium-42, an isotope of vanadium
 V, the third inversion of the dominant seventh chord