Porsche is about to extend the Cayenne model range by two more variants. Within shortly the Cayenne will be available also with a six-cylinder engine, which Porsche bought from Volkswagen and adapted to Porsche standards. With this, the sports car manufacturer hopes to sell an additional 5000 to 10,000 units. However, this is not all. As can be seen from these photos, there is also a Targa version of the Cayenne in the pipeline. Clearly visible on the prototype shots is the large glass roof, which is still hidden under some plastic coating. The pictures were taken of the car during high-speed testing at NÃƒÆ’Ã†â€™Ãƒâ€šÃ‚Â¼rburgring. In addition to the huge glass roof, the prototype pictured has several accessory items, including a front bumper guard that improves front-end styling, and a swing-away rear spare-tire carrier.