Depends on which Challenger you're referring to (base, R/T, SRT...)
Depends on engine
400 horsepower
The Dodge Challenger Hellcat as 707 horsepower.
R/t: 372/376, srt8: 425
425
Depends on engine, transmission, etc...
The 2010 Dodge Challenger's engine produces 250 ft-lbs. @ 3800 rpm.
372 I believe.
2009-10 - 250 hp, 2011-present - 305 hp.
368
The 2010 Dodge Charger SRT8 has 425 horsepower. The normal Dodge Charger that isn't supercharged will have a 368 horsepower engine.
250