2011 Dodge Challenger SRT8 on the dyno

The new and improved, as well as larger, 392 cubic inch Hemi present in the 2011 Dodge Challenger SRT8 is rated at a stout 470hp and 470 lb-ft of torque. These numbers already handily beat the previous generation's 425hp and 420 lb-ft, but it appears that they may be a little underrated.

The folks at Inside Line managed to get their hands on a 2011 model and strapped it to the dyno to find out what kind of power the new Hemi really puts out. The results were better-than-advertised rear wheel numbers of 452hp and 443 lb-ft of torque. And while the new Charger is still a good bit heavier than the Camaro or Mustang, this should help to even things up a little.

Dodge Viper ACR on the dyno

The true test for a car is on the dyno. No matter what the manufacturer says, there's some solace in seeing what kind of horsepower and torque it puts down. Not surprisingly, most muscle cars tend to put out more power than advertised.

The Dodge Viper ASC and the Corvette ZR1 are actually quite similar, according to Drag Times, with the Viper posting an impressive 546 horsepower and 510 lb-ft of torque compared to the supercharged ZR1's 549.9 horsepower and 500 lb-ft.

Considering that both vehicles use a six-speed stick and power the rear wheels, drivetrain losses should be similar, so these figures are relatively comparable. For what it's worth, Dodge officially (under) rates the ACR at 600 horsepower, and an estimated 15% loss through the drivetrain would put this beast at an actual 642 horses.