The 2012 Charger SRT8 gets some major revisions versus the 2010 model, most notably under the hood. The 2012 model gets a 6.4-liter Hemi V8 that churns out an estimated 465 horsepower and 465 pound-feet of torque. Dodge said specific horsepower, torque and fuel economy numbers will be announced closer to introduction in the fall. Pricing has not been announced.