http://autotelegraaf.nl/vanonzeredactie/?id=44026
rough translation :
Porsche, today is presenting it's Hybrid version of the Cayenne , ahead of schedule thanks to a cooperation with VW..
Also news via German press, Porsche wold also plan a Hybrid Panamera, the car has been designed keeping this technology in mind from the start, which wasn't the case for the Cayenne Hybrid. the idea was to implement this in a second generation of the Cayenne, but they managed to squeeze it into the current series.
This Cayenne hybrid was shown on tuesday to a small selection of Dutch press, and has the recently introduced 280 hp 3.6 Liter FSI gasoline engine under the hood, coupled to a 54 HP electrical drive and battery pack...
Porsche mentioned that the electric motor is active uptill 120 km/h and results in a lower fuel consumption
8.9 Liter per 100 km, vs 12.9 for the non hybrid Cayenne
The Cayenne hybrid is expected in showrooms in a year, as will a Touareg hybrid.
Porsche claims no hybrid version of either Boxster/Cayman or 911 will be made, since it's impossible to package the technology in such sportscars, they will implement a start/stop system, where the engine automatically cuts and restarts at a stoplight