The Turbo S, powered by a 4.8-litre V8 engine with twin turbo forced induction, delivering 404kW is the most powerful Cayenne of them all.

And despite the fact that Porsche has managed to give the new Turbo S better drive performance than the regular 368 kW Turbo model, the fuel efficiency figures for the Turbo S are exactly the same as those for the Cayenne Turbo.

From the outside, the Turbo S can be recognised by its 21 inch SportPlus alloy wheels housed within its painted wheel arches and by a sports exhaust system with four tail pipes made from aluminum investment casting. The air intake grills and wheel arches are painted the same colour as the car body. The new understated "lava-grey metallic" paint option is exclusive to the Turbo S.

All models of the Turbo S have a chassis which benefits from air suspension, as well as suspension leveling and ride-height control, along with Porsche Active Suspension Management (PASM), which – once again as standard – is combined with Porsche Dynamic Chassis Control (PDCC) and Servotronic speed-sensitive variable power steering.

New are the optional Porsche Ceramic Composite Brakes (PCCB) made from a carbon fibre ceramic composite. The front axle ceramic discs are 410mm in diameter, whereas the rear axle discs are 370mm in diameter. Deceleration takes place via six-piston calipers at the front and four-piston calipers at the rear..

The Cayenne range-topper gets the front sports seat with Comfort Memory Package, rear seating with individual seat contours, aluminium door panels showing the name plate together with leather upholstery in two exclusive dual-color combinations plus a leather steering wheel with padded centre.

The latest generation of the Porsche Communication Multimedia System Management (PCM) inclusive of navigation module with hard drive provides new functions actuated via a touch-screen. As with all other Cayenne models, the Turbo S also comes with the option of voice actuation with full word recognition for navigation system destinations, universal audio interface (with MP3 connection), cell phone link-up via Bluetooth and a TV module for both analog and digital terrestrial signals.

Offered as standard, the BOSE Surround Sound System with 14 speakers features 410 Watt output and is now capable of reproducing music from audio and video DVDs in 5.1 Discrete Surround Format.

The Turbo S's enhanced performance compared to the regular Turbo model is due to its modified exhaust system and improvements in engine control. Maximum torque has also been boosted by 50Nm to 750Nm within an engine speed range of 2250rpm to 4500rpm. The SUV accelerates from zero to 100km/h in 4.8 seconds to a top speed of 280km/h.

The Turbo S will be introduced into the market as from August 2008.