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Dodge to reveal Hellcat-powered Challenger in Detroit?

On top of all the other performance car debuts slated for next week's Detroit Auto Show, we might be able to add one more to the list - the new, supercharged Hellcat V8 from Chrysler. According to new reports, the rumored 640-horsepower mill is likely to cross the Motor City stage in the engine bay of a Dodge Challenger.
As AllPar points out, though, there may be more news than just the fire-breathing engine. While we've seen spy photos of the Hellcat testing under the hood of the current Challenger, there's a very fair chance that it won't arrive until the muscle car is refreshed later this year. The question now is whether that refresh will be shown off alongside the new engine in Detroit, or if it'll be saved, perhaps for the New York Auto Show.
Other details dug up by AllPar include potential transmissions for the supercharged engine - the Mopar-minded site is expecting an eight-speed automatic or a Tremec six-speed manual. Prices, meanwhile, could be in the same elevated range as the Chevrolet Camaro Z/28, at $70,000 to $80,000.

Chrysler readying Hellcat V8 with Viper-like power

A monstrous supercharged V8 engine could be in store for Chrysler and SRT products, if recent rumors are to be believed. Allpar is reporting that the forced-induction V8 - Chrysler's first, if this goes down - could make its debut this summer.
The story goes that the Hellcat would be based on a 6.2-liter Hemi engine, rather than on the existing 5.7- or 6.4-liter versions of the company's vaunted mill. In any case, the general consensus is that the motor will have gobs of power. Modest estimates call for between 500 to 570 horsepower, with some outliers predicting a figure as high as 600 hp. That figure would put the output would place the Hellcat awfully close to that of the 640-hp V10 in the SRT Viper, too. Allpar contends that a slightly lower powered version would allow Chrysler to keep costs below that of the more powerful Ford Shelby GT500, which might be a sweet spot.
The Hellcat could debut in a number of SRT products. SRT versions of the Charger, Challenger and 300 are all up for grabs, as is the rumored SRT Barracuda.

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.