Does The Dodge Challenger SRT Demon Have 900 HP?

Long before Dodge confirmed anything, rumors pegged the Challenger SRT Demon at over 900 horsepower. The real figure landed at 840 hp, but only with 100-octane fuel and the red ignition key, one of three power levels built into the car. Powered by a supercharged 6.2-liter Demon V8, it became the first production car certified in the 9s in the quarter-mile, and one of the most collectible modern muscle cars ever built.


Although we have yet to see the new Dodge Challenger SRT Demon in the flesh, we already know many things about it. For starters, we know that it will be one heck of a muscle car. We know it will be the most powerful, factory-built muscle car, as well as the quickest from 0 to 60 mph. We also know it will be RWD and that it will have a few unique features inside and out.

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Rumors swirled through the muscle car world long before Dodge ever confirmed a number, and for a while it seemed like anything was possible, with some insiders whispering about a Hellcat-based monster pushing past 900 horsepower, a figure that would have made it the most powerful factory muscle car ever built by a wide margin. Dodge stayed quiet, feeding the frenzy with teaser videos and cryptic hints about a car built exclusively for the drag strip. When the covers finally came off, the real number turned out to be something almost stranger than the rumor: three different horsepower ratings, two ignition keys, and one very specific type of gasoline standing between a Challenger and its full potential. So how close did the rumor mill actually get, and what did Dodge’s engineers have to sacrifice everywhere else on the car to hit that number?

The Number Behind the Rumor

The finished Challenger SRT Demon topped out at 840 horsepower, but only when running on 100-octane unleaded fuel with its red performance key inserted. Drop to 91-octane premium and the same red key limits output to 808 horsepower, while a black valet-style key caps the car at 500 horsepower for everyday, less theatrical driving. All three ratings come from the same supercharged 6.2-liter Demon V8, boosted by a 2.7-liter supercharger at 14.5 psi, producing 770 lb-ft of torque and redlining at 6,500 rpm.

Built Purely for the Quarter-Mile

Dodge engineered an SRT Power Chiller into the car, using the air conditioning system to cool intake air pulled through the Demon’s Air Grabber hood scoop, and offered a factory TransBrake and Drag Mode suspension calibration normally reserved for purpose-built race cars. The result was a production car capable of running the quarter-mile in 9.65 seconds at 140 mph, making it the first factory car ever certified by the NHRA to run in the 9s, a certification so serious that the Demon was actually barred from competing at NHRA-sanctioned drag strips without additional safety equipment.

A Numbers Game Buyers Still Chase

Dodge limited US production to roughly 3,300 examples, instantly turning the Demon into a modern collectible rather than just another performance trim. While plenty of Challengers have depreciated over the years, Demon values have generally held firm or climbed, driven by that combination of a genuinely wild spec sheet and a hard production cap.

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1 Comment

  1. Really. Well, I’m about to get into a whole lot of trouble then!

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