There's an all-new Porsche Cayenne SUV coming in 2018, and the flagship model in the range is set to be a hybrid.

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Not just any hybrid, though: the 2018 Porsche Cayenne will follow a similar path as the 2017 Porsche Panamera, with a Turbo S E-Hybrid version to sit atop the range.

The Porsche Panamera Turbo S E-Hybrid is powered by the same 4.0-litre V8 engine from the Panamera Turbo, but with an electric motor assisting with grunt to see it churn out 500kW of power (up 100kW over the standard Turbo) and 850Nm of torque.

This being the age of the plug-in, the Turbo S E-Hybrid also features recharging by wall socket, meaning it returns a claimed fuel use figure of 2.9 litres per 100 kilometres in the Panamera, and there's 50km of electric range to boot.

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That new Panamera was unveiled at the 2017 Geneva motor show, where Porsche CEO Oliver Blume told Australian media that the same strategy would be imparted when the new-generation Porsche Cayenne comes on line in 2018.

"That will be the same idea - Cayenne and Panamera with hybrid systems, this is perfect," Blume said.

"That's kind of our idea, to promote the electric power and therefore make the top of the line model a hybrid version, like the Turbo S."

Blume said that the larger models make better sense for hybridisation, with strong benefits due to plug-in drivetrains allowing the majority of urban driving to be done without tail-pipe emissions.

He added, however, that the smaller Macan may not follow suit, even in the next generation, and it's also unlikely that the 911 will in the near future.

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"At this moment we are thinking only about Panamera and Cayenne," Blume said. "What we will do with the 911 - the 911 is the 911 - and the most important engines in the future will be combustion engines.

"If you could come with a plug-in hybrid - it isn't decided yet - but the concept of the new 911 will be able to integrate a plug-in hybrid. With this generation we won't integrate the hybrid drivetrain," he said, meaning a 911 plug-in may not arrive until the early to mid 2020s.

Blume said that the company is spending about a quarter of all of its time, energy and resources on electrification of its models, ahead of the predicted launch of the Mission E pure electric model in 2019.

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"To give a percentage, it's about 25 per cent we are working on electric, and with the new-generation models I think every year it will be a bit more," he said. "It's very important to be flexible for the future, because the development of electrical needs will be very different in different countries.

"When you think about a long distance in Australia, people will have other arguments compared to people living in China and the big megacities. You have to be flexible - we make evaluations on every country in the world and repeat them every year, to think about what volume we will generate with electric attributes," Blume said.

It makes sense, given Porsche has previously told CarAdvice the company is planning to offer a family of models based on the Mission E electric vehicle, including an SUV.