A shock is the roominess of the back-seat area. Porsche boss Wendelin Wiedeking, a tall and substantial man, had barked about cramped headroom, so design chief Michael Mauer raised the roofline by 0.8 inch. Small as that sounds, it likely accounts for the awkward look to the Panamera’s rear quarters. It’s a wide car, at 76.0 inches, which adds to this feeling of spaciousness. Cargo room, too, is good: 16 cubic feet in the S model, 15 in the Turbo. With the rear seats folded down, all Panameras have 44 cubic feet of luggage space.
That’s a lot lighter than the 4910 pounds of the last Mercedes S63 AMG we tested—however, the Benz is more than nine inches longer—so it’s no surprise that Porsche is claiming some impressive performance numbers. The regular S will reportedly rip to 60 mph in 5.2 seconds on its way to a top speed of 175 mph. The 4S shaves 0.4 second off that sprint, its top speed unchanged. The Turbo claim is for a top speed of 188 mph and a 0-to-60 time of 4.0 seconds—a substantial half-second faster than we managed in the S63 AMG.
Source: Car and Driver