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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.

2015 Dodge Viper getting small increase in power

The Viper is used to being the most powerful car in the Dodge and SRT stables, but the arrival of the 2015 Dodge Challenger SRT Hellcat means that's no longer the case. The serpentine supercar is, however, reportedly getting a small boost in output for 2015, amounting to all of five horsepower.
The increase was uncovered by Road & Track courtesy of the SAE J1349 certification process to which Detroit's Big Three automakers submit themselves and which reports the Viper's output at 645 hp instead of the 640 it was rated at until now. There are a hundred factors that could have contributed to the relatively mild boost in output (best guess? nothing at all changed...), but we doubt anyone's going to complain about some extra horses under the hood.
The five-horsepower boost brings the Viper that much closer to the 650-hp Chevy Corvette Z06, not to mention the 707-hp Hellcat, but the Viper's impressive power-to-weight ratio ought to mean it'll have little problem keeping up in a straight line - which is just one of the reasons why Chrysler won't shoe-horn the Hellcat into the Viper: as R&T points out, the supercharged engine is too heavy and the blower makes it too tall to fit in the Viper's engine bay.

Mopar '13 Dart is a bruiser of a compact

For the fourth year in a row, Mopar is offering a limited-production car decked with a plenty of add-ons and a unique look. This year's black-and-blue car is the Mopar '13 Dart, which was unveiled at the Chicago Auto Show with the now-signature paint scheme. Like previous Mopar models, only 500 of the '13 Darts will be built. Past models include the Mopar '10 Challenger, Mopar '11 Charger and the Mopar '12 300.
The all-black Dart gets a brightly contrasting, offset blue stripe running the full length of the car, and other styling mods like the aero-tuned body kit, gloss black grille, wheels and mirror caps. Curiously, Mopar chose to stick with the Dart's standard headlights rather than the darker, smoked lights. The interior gets a similar black-and-blue treatment, but this unique cabin features a blue leather driver's seat to go along with the black leather seating for the rest of the passengers.
More than just a styling package, the Mopar '13 Dart also gets some performance and handling goodies to complement the Dart's turbocharged 1.4-liter engine, such as upgraded brakes with slotted rotors, a lowered suspension, retuned electric power steering and a "sport-tuned" exhaust system.