We've already heard the Challenger Hellcat will be “absolutely sinister" with "stupid power," but it appears it could outgun the SRT Viper.
Speaking to Hot Rod Magazine, SRT CEO Ralph Gilles said "We have a situation where ... the flagship car is not the most powerful car in our arsenal." He declined to go into specifics but noted "We have an internal horsepower race as well as an external one."
While Gilles didn't mention any numbers, the SRT Viper has an 8.4-liter V10 engine that develops 640 bhp (477 kW) and 600 lb-ft (814 Nm) of torque. This suggests the Hellcat's supercharged 6.2-liter V8 will produce more than 640 bhp (477 kW) and some reports have even suggested the output could be as high as 700 bhp (477 to 522 kW).