Car and Driver says about the Panamera Turbo S

The difference is not insignificant. The Panamera Turbo makes 516 lb-ft of torque in regular trim, and the Turbo S provides up to 553 lb-ft—or 590 with an overboost function. We estimate a 0-to-60-mph time of three seconds flat, and Porsche’s stated top speed rises by 2 mph to 190. There is one transmission: the excellent PDK, a ZF-sourced seven-speed dual-clutch automatic.

It routes power to all four wheels, with a noticeable bias toward the rearmost pair. At virtually any velocity, this quickest of the four-door Porsches will charge forward with a menacing growl. It’s unlike, say, the Mercedes-Benz S600 or the BMW 760i, in which speed builds in surreal silence, and it doesn’t take a very long stretch of road to max out the Panamera. That’s not to say it’s a white-knuckle affair. This Turbo S masks actual speed very well, and 120 mph feels like 70. Remarkably, however, the Panamera might be even more efficient at killing speed than building it up, especially when equipped with the optional carbon-ceramic brakes, which bite instantly and aggressively.