Porsche research and development boss Wolfgang Hatz says plug-in hybridisation is the "best solution" for the German firm's saloon and SUV models, but maintains its sports cars "are not ready" for the technology.
Speaking at the Shanghai motor show, Hatz said the recently launched Panamera E-Hybrid, which is said to produce less than 100g/km of CO2 according to official figures, could pave the way for a hybrid version of the Cayenne.
"I believe plug-in is the best solution for customers for the next ten years. Right now it is the ideal concept and that's why we pushed so hard to bring it to production," he said.
"It is the right technology for the Panamera and maybe also the Cayenne, but it is clear that the rest of our cars are not ready, they must remain true sports cars.
"For now, we can be proud of being far ahead of the opposition. You can never say we are a green company, but it does allow us to show our concerns for the environment. We understand our responsibility and that is why we have made the huge effort. Sustainability is not just a word – it needs demonstrating, and the Panamera E-Hybrid does that," added Hatz.