Porsche first unveiled its Cayenne Hybrid S back in November of 2007 at the Los Angeles Auto Show, and after more than two years later, the greener SUV has yet to hit the road. Even still, the waiting game is not quite over as the Cayenne Hybrid S is still about a year away from production.

In an interview with Germany’s Rheinische Post, Porsche board member Wolfgang Dürheimer revealed the Cayenne Hybrid S will be in dealer showrooms in the second half of 2010. Dürheimer also indicated the Cayenne Hybrid S will retail from about €90,000 ($124,500).

Porsche says the Cayenne Hybrid S will offer V8 power with four-cylinder efficiency, and by the looks of the numbers, it could be spot on. The Cayenne Hybrid S will use an Audi-sourced turbocharged 3.0L V6 — developing 333 horsepower and 324 lb-ft of torque — with an electric motor contributing another 52 horsepower and 221 lb-ft of torque. That should be enough grunt to get the Cayenne Hybrid S from 0-60 in a typically un-eco-friendly 6.8 seconds.

Despite its high-performance aspiration, the Cayenne Hybrid S will produce 20 percent fewer CO2 emissions than its gasoline counterpart – good enough to qualify as an ULEV II. Porsche hasn’t released official fuel economy figures for the Cayenne Hybrid S quite yet, but early reports suggest the SUV could hit 32 mpg on the highway — 10 mpg better than the V6-powered Cayenne.

Porsche also revealed the Cayenne Hybrid S will be capable of traveling up to 1.2 miles on electric power alone, with the gas engine kicking in within 380ms when needed. Additionally, the Cayenne Hybrid S will be able to maintain electric power alone all the way up to 86 mph — making zero-emission highway driving possible.

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