Stock Challenger RT Auto Dyno Results, HP and Torque Numbers. After breaking in my new Dodge Challenger RT 5.7 Hemi, I decided to test its stock horse power and torque on a Dynojet. For reference, a 2009 Dodge Challenger RT with an automatic transmission is rated at 372 HP and 400 FT LBs of Torque from the factory.
Challenger Dyno Test Stock HP and Torque
I headed to DynoSport for the test, working with Dan, an experienced Dyno Technician. If you're located in or near Nebraska and need to dyno your car, truck, or motorcycle, I highly recommend reaching out to DynoSport for their unbeatable service and pricing.
My White Dodge Challenger RT Auto
Meet my white 2009 Dodge Challenger RT. It features an AutoStick transmission and came with all of the factory available options except GPS, sunroof, and 20-inch wheels. The RT package includes the powerful 5.7 Liter Hemi Engine rated at 372 HP stock. Aside from hood struts and a drop-in K&N air filter, the car is completely stock. I also used a Diablosport Predator Tuner to disable the factory MDS (Multiple Displacement System), ESP (Electronic Stability Program), and speed limiter for the dyno runs.
I arrived at DynoSport in Lincoln, NE at around 6:30 pm, and by 6:45 pm, my Challenger was on the Dynojet ready for some dyno pulls. Note that there were NO cooldown periods between runs.
Stock Challenger RT Auto Dyno Testing Results
We performed 4 consecutive dyno pulls in fourth gear (1:1 ratio). The first pull hit the factory speed limiter between 140-160 mph, and the second and third pulls were made after disabling that feature. The results from my Challenger RT Auto dyno runs are as follows:
- Run 1 (Blue): Disrupted due to the speed limiter.
- Run 2 (Red): Best run, producing 317.8 HP and 348.3 FT LBs of torque at the wheels.
- Run 3 (Green): Consistent results close to Run 2.
Using a 17% loss calculation through the automatic drivetrain, my Challenger RT is generating approximately 372 HP and 408 FT LBs of Torque, which aligns perfectly with Dodge’s official ratings of 372 HP/400 FT LBs for the AutoStick Challenger models.
Here's the full Stock Challenger RT Auto Dyno HP and Torque breakdown in 100 RPM intervals, including barometric pressure, vapor pressure, and air temperature. It was a hot and sticky day, and the numbers shown are both uncorrected and corrected in the chart below.
Overall, I was pretty impressed with the HP and Torque ratings specified by MOPAR from the factory. My stock Challenger hp and tq dyno runs pretty much aligned as we'd expected.
I hope this was helpful for anyone wanting to know how a Challenger performs on a dynojet stock. For reference, I also have a somewhat related posts on how to get a Window Sticker by VIN which can be helpful if you need to find a Window Sticker for your Dodge Challenger.