New styling previewed
As well as formalizing plans for a new Panamera wagon, the Sport Turismo also provides solid clues to the appearance of all second-generation Panamera models. The classic proportions remain, with a long, sweeping hood dominating the side profile. However, there has been a conscious effort to rid the new car of the bloated look of the existing liftback, with tauter surfacing treatment and the use of subtle creases within the body to break up large expanses of bodywork.
Among the details developed by Porsche design boss Michael Mauer and his team of in-house designers for the new car are newly shaped headlamps with distinctive double-deck LED graphics, a more heavily contoured hood, greater structuring to the flanks with a reinterpreted version of the brake cooling graphic incorporated behind the front wheel arches, a more prominent lip to the rear wheel arches to accentuate the stance and thinner LED taillamps that, in a nod to classic 911 models, are connected by a reflector strip.
In a move that indicates Porsche is looking to adopt new rear view technology on its next generation of cars, the Panamera Sport Turismo does without conventional exterior mirrors. Their job is taken care of by two cameras mounted within the side air outlets, with images shown on a display in the cabin.
At 194.9 inches long, 78.3 inches wide and 55.2 inches tall, the Porsche concept car is 0.8 inch shorter, 2.4 inches wider and 0.7 inch lower than the soon-to-be-facelifted Panamera liftback. By comparison, the Mercedes-Benz CLS Shooting Brake is 196.9 inches long, 74.1 inches wide and 55.6 inches high.
New plug-in hybrid system
As well as previewing its plans for a wagon, the concept car showcases a powerful new plug-in hybrid drive system Porsche intends to begin offering with the second-generation Panamera and facelifted second-generation Cayenne in the middle of the decade as part of its Intelligent Performance initiative.
Called e-hybrid, the Porsche-developed system uses an upgraded version of the existing Panamera hybrid's brushless synchronous electric motor mounted within the forward section of the gearbox housing, delivering 94 hp. It is supported by the same Audi-sourced 328-hp supercharged 3.0-liter V6 gasoline engine used today.
Together, the electric motor and V6 provide a combined system output of 410 hp -- a good 35 hp more than today's Panamera hybrid. The plug-in powertrain will propel the next-generation Panamera from 0 to 62 mph in less than 6 seconds while providing combined fuel consumption on the European test cycle better than 67.2 mpg.
Energy for the electric motor is provided by a 9.4kWh lithium-ion battery mounted in the floor of the trunk. It is planned to replace the nickel-hydride battery used by the current Panamera hybrid, with plug-in compatibility allowing it to be externally charged within 2.5 hours via a high voltage wall mounted charger.