The production goal is set to coincide with the end of contract between Porsche and Valmet Automotive of Finland so the new models of the range will be delivered under an agreement with the Austrian firm Magna Steyr.

The bigger wheel arches of the sheet metal gives out a hint that the Porsche Cayman may be using another platform suggesting of a wider track. Looking forward, the new car will be bigger than the current version with improvements on its dynamics and handling.

The test car is in the early stage of development with the roll-cage still very evident from the spy photos. It might be too early to assume the changes that will be made by Porsche on the engine of the Cayman or the Boxster but for sure that powerplant of the new vehicles will carry over the features of the flat-six range with minimal upgrades.

There is a buzz though in the automotive community that Porsche is planning to use a lighter engine with the new cars and it will be based on a 4-cylinder platform that will be turbocharged and will be a lot lighter than the previous generation.

The new design propositions may also give way for a release of a Carrera with a smaller engine to meet the stricter emission requirements. The current generation of Porsche Cayman and Boxster has a carbon dioxide emission of about 222g/km which is about 100 g/km above the possible 2015 limits.

PHOTOS AT MOTOR AUTHORITY!

According to the Stuttgart, Germany-based manufacturer, the Panamera is built for total performance and maximum efficiency. The designers boast of Panamera as the first car with an automatic double clutch transmission that is coupled with an engine that has a Start/Stop system.

The start/stop system adds to the fuel efficiency of the Panamera as it turns off the engine when its power is not needed, like when waiting for a green light. Aside from this benefit, the technology also helps in lowering its emissions.

The engine of the Porsche Panamera is also equipped with the very efficient Direct Fuel Injection technology. All Porsche Panamera due for release in the United States in October 2009 comes with a PDK gearbox which makes it more fuel efficient.

The wheels of the Panamera are also designed to have lesser rolling resistance. The brakes are also engineered to have minimum residual brake forces.

The Panamera only uses up 10.8 L of fuel for every 100 kilometers or 26 mpg imp. That’s not AWESOME fuel efficiency, but that’s good for a Porsche.

The car on its Panamer Turbo release comes with a rear spoiler that is adjustable in a multi-stage setting. The four-way spoiler is activated depending on the driving condition and employs excellent surface geometry and precision control of the angles.

The body of the Panamera consists of different steel grades, alloys like magnesium and aluminum, and plastics. This ideal architecture gives the Panamera S only weighs around 1800 kilograms.