Set for a world premiere next week at Geneva is this Porsche Panamera Sport Turismo tuned by German-based Techart. Techart calls it the GrandGT Supreme styling package, specifically for the Panamera Sport Turismo. Styling wise, it dramatically enhances the car's presence, starting with a set of 22-inch wheels with the entire car painted in gorgeous racing green. Also added is a Techart sport exhaust system with titanium and carbon fiber tailpipes. But it's the interior that's received the most attention.

Techart's in-house team of expert craftsman developed an un-embossed Nappa leather with a smooth and natural texture that covers the entire interior, including the footwell and door panels. The leather has been vegetable-tanned so that it's free of chromium. Also take note, in the included photos, of some of the finer details, such as the handmade multi-color stitching and customized Techart sport steering wheel. Under the hood lies the Panamera Turbo's 4.0-liter bi-turbo V8 whose output has been increased from 550 hp to 640 hp. This engine upgrade also reduces 0-62 mph time to just 3.4 seconds and 0-124 mph in 8.3 seconds.

In addition to the Panamera Sport Turismo GrandGT Supreme, Techart will also display a modified 911 GT3 and 911 Turbo, both with all sorts of carbon fiber accessories, along with range of tuned Macans. We'll have full coverage starting next week straight from Geneva, so stay tuned.