We've known for months now that Dodge would be dropping a new 6.4-liter (392 cubic-inch) Hemi V-8 into its SRT8 variant of the new 2011 Dodge Challenger, and then in late October we finally saw it. Now we have some insight into the kind of power delivery we can expect from the big cube V-8 thanks to these latest dyno results.

On paper, the 2011 Dodge Challenger SRT8 produces 470 horsepower and 470 pound-feet of torque but it appears Chrysler may be understating those figures.

Putting the car on a dyno, the guys at InsideLine found that the new 6.4-liter Hemi produces as much as 365 pound-feet of torque from as low as 2,500 rpm and sees this figure rise to a peak of 443 pound-feet at 4,400 rpm. Peak power, meanwhile, measures in at 452 horsepower and arrives at 6,200 rpm.

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Note that these figures are measured at the wheels so even with a very conservative drivetrain loss rate of 10 percent, the 2011 Dodge Challenger SRT8’s V-8 engine could potentially be producing more than 500 horsepower and 490 pound-feet of torque at the flywheel.

2011 Dodge Challenger SRT8 vs 2011 Chevrolet Camaro SS

2011 Dodge Challenger SRT8 vs 2011 Chevrolet Camaro SS

Pictured is a comparison of a Camaro SS’s dyno results, showing the Dodge develops considerably more power and torque, especially during midrange rpm levels. Of course, the Camaro SS costs a lot less than the Challenger SRT8 and there is a supercharged Z28 model just around the corner. The Dodge may not be able to hold its edge over the Chevy for much longer.