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"More Mopar engine news today: The 2015 Viper is getting extra power. And no, before you ask, it&amp;#039;s not by way of a Hellcat V-8. We already told you that wasn&amp;#039;t going to happen. The Viper, now rightfully a Dodge again, is keeping its 8.4-liter V10. RELATED: Dodge is building the world&amp;#039;s most powerful super-sedan The news comes from the same source that confirmed the impending existence of a Hellcat-engined Charger sedan, the SAE J1349 certification database. (SAE J1349 is an opt-in test for manufacturers to get engine output certified. Currently, Ford, GM, and Chrysler are the only automakers that take advantage of it.) Some tuning brings horsepower up to 645 from 640; torque stays at 600 lb-ft. It&amp;#039;s not quite enough to beat the 650-hp new Corvette Z06, but there&amp;#039;s a good chance the Viper will be the lighter car. RELATED: 10 things we learned driving the Dodge Challenger SRT Hellcat While the SAE certification doesn&amp;#039;t say how the extra power was coaxed out, we&amp;#039;d guess that it involves some combination of improved breathing and altered code. Maybe something was learned from the hole-in-the-headlight arrangement that feeds the Hellcat&amp;#039;s airbox. Or maybe they were just sandbagging before. Reminder: Putting a Hellcat engine in a Viper would be silly! While the supercharged 6.2 makes 62 hp and 50 lb-ft of torque more than the Viper V-10, it weighs about 180 pounds more and the blower means it&amp;#039;s too tall to fit under the stock hood. It&amp;#039;s a ridiculous idea, and one that someone will inevitably make real, and we will enjoy its smoky burnouts all the same. And even if the Viper doesn&amp;#039;t have 707 hp, it keeps its superior power-to-weight ratio, which for 2015 is improved by 0.8 percent. We&amp;#039;re confident it will still light the tires on command.  RELATED: 13 SRT Viper questions, answered "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.roadandtrack.com/new-cars/future-cars/news/a8403/news-2015-dodge-viper-gets-sae-certified-bump-in-power/>