It's already been spied many times: the current Porsche 911, codenamed 991, is set to be replaced within the year by a new 911 992 model. Porsche is looking to hit the ground running as well: not only is it hard at work developing the core Carrera models, it's also busy developing the future 911 Turbo model.

Here is that very car, hidden beneath a modified version of the current 991 body. The modifications are hardly subtle: huge front and rear wings, plus broader track and bigger wheels, mean it looks quite the home-grown special at first glance. But appearances are almost certainly deceptive, for beneath the bodywork lies a seriously powerful engine. 

2019 Porsche 911 Turbo Spy Pics
2019 Porsche 911 Turbo Spy Pics
2019 Porsche 911 Turbo Spy Pics

How powerful? Rumours are the new 911 Turbo's uprated 3.8-litre twin-turbo flat-six engine will boast a full 600hp – after all the current special edition 911 Turbo S Exclusive Series has already toppled this, and Porsche won't want to be seen taking a step back with the new model. 

And if you think that sounds fanciful, consider this: similar rumours suggest the very same engine in the recently-revealed 911 GT2 RS will produce a monster 700hp, suggesting there's plenty of wiggle room left in it for future-gen 911 Turbos. 

It's early days yet: this raw-looking prototype was probably proving the car's basic integrity on a modified version of the regular model's platform, rather than being a fully ground-up prototype build. But its emergence nevertheless proves Porsche's readying the next-gen 911 onslaught, which will begin in 2018: as for the Turbo, look to 2019 for that to power into view. Best get preparing for the power rush.

Source: CarPix

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Gallery: 2019 Porsche 911 Turbo Spy Photos