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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.

2015 Dodge Challenger SRT Hellcat has 707 glorious horsepower [w/video]

Hold onto your butts. "600-plus horsepower" is what we were told to expect from the 2015 Dodge Challenger SRT with its 6.2-liter supercharged Hellcat V8 engine. But as we've just learned, those were incredibly conservative numbers. Dodge has officially announced that the range-topping Challenger will hit the asphalt with 707 - seven hundred and seven - horsepower, making it the "most powerful muscle car ever."
Of course, 707 hp is only part of the story, as the Hellcat has also been confirmed to produce 650 pound-feet of torque. All that power will run exclusively to the rear wheels through an eight-speed automatic transmission that differs from other Challengers. The new gearbox, 8HP90 (rather than the 8HP70) is "upgraded to handle the extra power and torque," says Dan Reid, SRT's manager of product design and motorsports.
We certainly hope you're prepared to spend a ton of money replacing tires.

2015 Dodge Challenger SRT Hellcat [w/videos]

Darrell Waltrip once said, "If the lion didn't bite the tamer every once in a while, it wouldn't be exciting." The sentiment behind that aphorism is causing my adrenal gland to wake up as Dodge and SRT drivers and engineers - somber-faced to a man - give me the track talk that will precede my driving the 2015 Dodge Challenger SRT on the circuit at Portland International Raceway. PIR might not be Daytona, and the 707-horsepower Challenger Hellcat might seem tame to a legend like ol' Jaws, but there's a not-small part of me that's thinking about how hard Dodge's fire-breathing kitty might bite.
Just a few hours previous, I'd gotten behind the wheel of the Hellcat for the first time, letting its hyperbole-spitting, supercharged V8 Hemi pull me yieldingly through Portland's morning commuter traffic. Lulled into a cocky certainty by the Challenger's good manners at low speed, I drove the throttle just a hair too deep, too fast when I ran on to the highway ramp. For just an instant the rear tires were utterly drenched in torque, and the back end of the big Dodge loosened up like a drift car on a wet track. Throttle steer lives at the fleeting whim of your right foot in this car.
It was no big thing to lay off the gas and pull the Hellcat back in line as I entered the highway, but the incident did get me to thinking: What will this car do to me on a road course?