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A top tuning company has built one of the world’s most powerful topless cars – a 910bhp Porsche 911 Turbo Cabriolet.

9ff has increased the standard 911 turbo engine from 3.6-litre to 4-litres and fitted two turbochargers boosting power by 430bhp. 

The Dortmund-based tuner hasn’t confirmed performance figures but expect the Teutonic rocket to accelerate from 0-60mph in considerably less than four seconds.

And last year a 780bhp 9ff-tuned 911 Cabrio hit 236mph so expect to see the latest incarnation to top 240mph.

Click here for more pictures of the amazing Porsche

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