Chevrolet has so far offered just a tease of the new 2015 Corvette Z06 debuting next month week.

Chevrolet plans to punch up both the power and performance of the new Corvette Z06, it appears, with the new 2015 model due to deliver at least 620 horsepower and 650 pound-feet of torque.

Or so suggests the normally hidden data for a Z06 launch site Chevy is preparing.  Though the site isn’t supposed to go live with information on the new model until its official unveiling at the North American International Auto Show in Detroit next week, it turns out some of the specs were buried in what is known as a meta file.

And that was accessed by a Jalopnik reader doing an Internet search for “2015 Corvette Z06 supercar reveal.”

For a brief while, the engine data would pop up in the text brief underneath the search results – at least until Chevrolet programmers realized what was happening and pulled the metadata down.

If that proves to be accurate, and there’s little reason to suspect it isn’t, that would be a massive jump from the last-generation Z06, at a mere 505 hp and 470 lb-ft of torque. But even more impressive is the fact that the new model will come within a hairsbreadth of the 638 hp pumped out by the most recent, version of the top-end C6 Corvette ZR1, and offers even more torque.

(Chevy to offer new Corvette Performance Data Recorder for racers and weekend warriors. Click Herefor more information.)

While GM is being tight-lipped about the new C7-based Z06, it is expected to be powered by a supercharged LT4 V-8 engine, downsized from the last version’s 7.0-liter V-8.

In a brief tease of the new model, Alan Batey, senior vice-president, Global Chevrolet – and soon-to-be president of GM’s North American operations — boasted, “No other manufacturer will be able to match the breath of performance cars from Chevrolet,” a reference not only to the various ‘Vette versions but also the new Camaro Z28 and Chevy SS models just coming to market.

(New Chevrolet Camaro Z/28 will go for $75,000. Click Hereto check it out.)

Chevy has big plans for the basic Corvette platform first seen at the 2013 Detroit Auto Show. A number of variants are in the works, ‘Vette chief Tadge Juechter explaining that the Detroit maker has learned a lot from rivals like Porsche and will steadily roll out Corvette variants over the course of the C-7, or seventh-generation, model’s lifecycle.

The first of these, the Corvette Convertible, will make its sales debut early next year. The Z06 will follow, and a next-generation ZR1 is known to be in the works.