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Dodge Challenger spied exercising supercharged Hellcat Hemi V8

One of the prime complaints against the Dodge Challenger is that, even in SRT8 guise, its 470 horsepower is responsible for hauling over 4,200 pounds of vehicle. For comparison, the 420 hp in the Ford Mustang GT only has to deal with 3,618 lbs. Things only get worse from there, as the higher-performance variants of both the Mustang and the Chevrolet Camaro are far more powerful than an SRT8 without adding on much heft.
So what is Chrysler to do? The correct answer is add a whole lot more grunt to its hefty two-door and even the odds. That's where the all-new Hellcat engine comes into play. We reported on this engine in May, and suggested that the Hellcat, a supercharged powerplant based on a 6.4-liter V8, would easily generate 500 to 570 hp and could likely arrive boasting more than 600 ponies.
Chrysler's ace in its sleeve has now been spied testing, with a number of Hellcat-equipped Challengers running the potent new engine both in more urbanized areas and under the sun of Death Valley. The hoods on these testers have been raised to accommodate the engine, and that camouflage over the fascias of these prototypes is there to hide a larger air intake. We also note what appears to be a new split grille under wraps. As for power output, our spies are now suggesting a Viper-equalling 640 hp from the Hellcat-equipped cars.

The Dodge Demon was developed under a cloud of smoke

The Dodge Demon needs no introduction. The car is so full of superlatives that most of it sounds unbelievable until you see and hear it in action. The car was revealed after months of teasers and cryptic messages, but the public weren't the only ones in the dark. From the start, the Demon's development was a closely guarded secret. There were even some within SRT that didn't know about the project. The people behind the car went through a lot of effort to keep it that way. At an event covering the finer details of the Demon's supercharged 6.2-liter V8, Dodge CEO Tim Kuniskis and SRT Powertrain Director Chris Cowland spoke about the smoke and mirrors used to hide the Demon's development. Work on the car progressed for nearly two years before it was made public, with just a small team having full access to the project. Numbers were altered. Secret meetings were held. SRT engineers worked nights and weekends while parts suppliers were given as little information as possible to move progress forward. Preliminary work on the Demon began in April of 2015, not long after the standard Hellcat hit the streets. The goal wasn't to create a faster Hellcat. Kuniskis said that would have been easy. They wanted a single-minded vehicle that could also be driven on the road. It's the same mindset that brought about the Dodge Viper ACR. Dodge wanted a car that could sell the brand to both enthusiasts and non-enthusiasts alike. 840 horsepower is going to raise anyone's eyebrows, including the Camry owner parked down the street. While preliminary work started in April, the final greenlight wasn't given until September. The project was originally going to revive the American Drag Racer, or ADR, name. When we saw the first hints of the Demon last fall, we labeled the spy photo above the Dodge Challenger ADR. It was set to have 10-percent more power and 20-percent more launch force than the already gut-punching Hellcat. It was also only going to have a quarter-mile time in the 10s, just slightly quicker than the Hellcat. Somewhere along the line, the team realized that the ADR wasn't enough. It was just going to be a Hellcat plus, and that wasn't exciting. The main goal was changed: 9s with light. Translated, that means a 9-second quarter mile with light under the tires (read: a wheelie). From that point forward, everything about the Demon's development, from power to suspension to weight, would be done in pursuit of that goal.

Dodge Challenger SRT Hellcat vs. Chevrolet Camaro ZL1 in latest Head 2 Head

"Olympian" is one of the terms we use to signify the greatest height, the seat of the gods. Yet Mt. Olympus is the second-highest peak in the Balkans ranges, overshadowed by the crest at Musala in Bulgaria's Rila mountains. Both great heights, but one is a little higher. That's how we get the Olympian Chevy Camaro ZL1 pitched at the Musalic Dodge Challenger SRT Hellcat in Motor Trend's latest episode of Head 2 Head. The side-by-side spec sheet is filled with farcical numbers. For the ZL1, that's a 6.2-liter V8 with 580 horsepower, 556 pound-feet of torque, a 4,051-pound curb weight, 0-to-60 miles per hour in 3.9 seconds, a quarter-mile time of 12.2 seconds and a base price of just $57,800. Opposing that, the Hellcat wrings out its 6.2-liter V8 for 707 hp, 650 lb-ft of torque, weighs 4,449 pounds, does the quarter in 11.7 seconds and has a base price of just $60,990. Except in the case of the Hellcat, when Motor Trend put it on the dyno the machine spit out a reading of 672 hp and 606 lb-ft at the wheels. If there's a 10-percent driveline loss through those beefed-up internals and heavy-duty eight-speed transmission, that means the Hellcat is actually rated at about 750 horsepower and 700 lb-ft. But once they get put on a closed-off strip of coast road in Northern California, there are only a few strands of hair between their respective performances. That's not the case for they sensations provide; host Jonny Lieberman calls one of them, "One of the most incredible cars ever made," and says, "It changes everything." Watch the video above to see who got the verdict and how. Related Video: