Abbr., Honda's variable-valve-timing engines (1,1,1,1), 4 letters
Dodge Viper engine, for one, 4 letters
Engine in a Dodge Viper, 4 letters
Former Formula One car engine, 4 letters
Popular Formula One engine, 4 letters
Powerful auto engine, 4 letters
Powerful car engine, 4 letters
Powerful kind of engine, 4 letters
Aircraft that doesn't taxi: Abbr., 4 letters
Helicopter ability (abbr.), 4 letters
Rockets deployed in Germany's second wave of missile attacks during WWII, 3 letters
Tailor-made drink?, 12 letters