An official video of the all-new 2012 Porsche 911 has been released, giving us our first listen to the supercar’s flat-six engine and a peak inside the interior.
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The video reveals the 991-series Porsche 911 undergoing final testing and validation work in South Africa, where it endured temperatures as high as 39 degrees.

A close look at the gear knob at the end of the clip (click image below to zoom in) confirms months of speculation that the new Porsche 911 will feature a seven-speed manual transmission. Like in the current line-up, a seven-speed PDK dual-clutch gearbox will be optional.

The teaser video also gives us a quick look at the Porsche 911 Cabriolet with its fabric roof on.

The few glimpses of the interior reveal a taller centre console similar to the Porsche Panamera.

So far we know the new 991 911 will be slightly larger than the current 997 911 and will feature a longer wheelbase and shortened front and rear overhangs.

Despite the growth, its weight will drop marginally thanks to the extensive use of magnesium and aluminium.

The new 911 range will feature start-stop engine technology, electric power steering, and – for the PDK models – an electronically controlled limited slip differential.

The entry-level Carrera will be powered by a 3.4-litre engine (down from 3.6 litres) with 260kW of power and 380Nm of torque.

The hotter Carrera S retains a 3.8-litre displacement although power is up to 298kW and torque climbs to 440Nm.

The 2012 Porsche 911 will be officially unveiled at the 2011 Frankfurt Motor Show in September.