Renowned Porsche tuner TechArt has introduced the GrandGT program for the Panamera, which covers pretty much every aspect of the executive car.

The engine management system, which does not interfere with the standard software, increases the output and torque of the GTS and Turbo S models by 182 PS (180 HP / 134 kW) and 150 Nm (111 lb-ft), and 90 PS (88 HP / 66 kW) and 130 Nm (96 lb-ft) respectively.

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This means that the twin-turbo 4.0-liter V8 engine produces, according to TechArt, 669 PS (660 HP / 492 kW) and 770 Nm (568 lb-ft) in the Panamera GTS, and 720 PS (709 HP / 529 kW) and 950 Nm (701 lb-ft) in the Panamera Turbo S. The 0 to 100 km/h (0-62 mph) acceleration takes 3.4 and 3.0 seconds respectively, while top speed stands at 305 km/h (190 mph) in the GTS and 315 km/h (196 mph) in the Turbo S.

TechArt has increased the width of the car by 50 mm (2 in) at the front and 80 mm (3 in) at the rear by adding wheel arch extensions. The front bumper features larger air intakes that optimize the airflow and improve the cooling of the brakes, and an integrated apron. The carbon fiber hood with a powerdome and central air outlet contributes to the muscular design, alongside the rear wing and four-fin diffuser with cutouts for the titanium tailpipes with carbon fiber coating. A selection of 21- and 22-inch wheels rounds out the exterior makeover.

For the interior, the tuner offers a selection of leather and Alcantara, in different patterns and colors, contrast stitching and piping, aftermarket floor and trunk mats, and carbon fiber trim, and their logo is embossed in the door trim, seats and floor mats.