On a chilly December morning in Northern California, I brought a 2012 Chrysler 300 SRT8 to TPS Motorsports in Campbell, California for a couple of dyno runs on their Dynojet chassis dynometer.

Truth was in the numbers as we dyno tested the Chrysler 300 SRT8 that claims 470 horsepower and 470 lb.-ft. of torque from Chrysler’s 6.4L HEMI powerplant. Power was measured at the wheels and the numbers were SAE corrected. Video and power output charts below document the results of our dyno test.

2012 Chrysler 300 SRT8 dyno test results

After two test runs, maximum horsepower measured at the wheels was 411 horsepower. Maximum torque was 400 lb.-ft. with 80 percent of max torque being available at 55 mph. Generally, there is an 18 – 20 percent drop in power due to parasitic drivetrain losses with the 5-speed automatic. Ambient temperature in the garage was about 55 degrees Fahrenheit.

Chrysler goes big spec’ing the parts for the 300 SRT8 – big 6.4L HEMI V8, big Brembo brakes, and even bigger 20-inch black chrome wheels. Think of the 300 SRT8 having multiple personalities.

Driving around town you are surrounded by a luxurious interior filled with high tech features such as adaptive cruise control, Chrysler’s Uconnect Touch™ system, and sport-inspired leather seats that are both heated and cooled. Transforming the 300 SRT8 into a track monster is a 470hp 6.4L HEMI V8 that has more torque than Ford’s F-150 V8, a sport tuned suspension and active all-wheel drive system which immediately transitions from RWD to AWD by automatically detecting road conditions, and four-piston Brembo brakes because stopping is just as important as going fast.

Editor's note: Many thanks to TPS Motorsport staff for giving their time to dyno test the 2012 Chrysler 300 SRT8 and making the dyno test run video. TPS Motorsports is located in Silicon Valley and focuses on servicing and upgrading American muscle cars. With more than five years of experience dyno testing more than 5,000 cars, TPS Motorsports was invaluable in me its expertise and educating me about dyno testing.

For more information about dyno testing, visit: www.tpsmotorsports.com.

Derek Mau, former editor of CarReview.com, is a contributing editor of TheWeeklyDriver.com

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