The German tuners from Edo Competition claim that if you would want to go faster than their upgraded Porsche Panamera Turbo S then you would have to fly.
They say that because they managed to squeeze an additional 150 HP and 130 Nm (96 lb-ft) of torque out of the Panamera Turbo S, which means its total output is now 700 HP and 800 Nm (649 lb-ft) of peak torque.
The increased performance was enabled by the extensive modifications applied to the turbocharged engine, with some of the enhancements including custom manifolds, bigger turbos, high-flow catalytic converters and air filters, as well as a stainless
steel high-performance exhaust system with butterfly valves.  
This way the luxurious four-door coupe becomes pretty impressive in terms of acceleration, as it requires only 3.5 seconds to go from 0 to 62 mph (100 Km/h) and 11.4 seconds to reach 124 mph from a stand still (0 to 200 Km/h).
Apart from improving its 0 to 62 and 0 to 124 mph sprint time by 0.3 seconds and 2.1 seconds respectively, the Edo Porsche Panamera Turbo S is also capable of hitting a new top speed of 340 Km/h, a figure which is limited by an electronic governor.
The Edo Porsche Panamera Turbo S also comes with a 33 mm lowered suspension, 22 inch carbon-fiber-look racing wheels and a further refined interior that makes use of the finest leather and other high-quality materials that replace the factory trim.

Source: Edo Competition