Porsche plans to offer 20 variations of its vehicles to keep sales strong in the highly competitive U.S. market in the next few months. The U.S. is the most important performance market in the world and Porsche plans over the next few months to offer more than 20 new variations of its vehicles to its American and Canadian customers to ensure it stays on top, according to Klaus Zellmer, Porsche USA CEO. "Demand for performance cars in the U.S. has never been stronger," Zellmer said during the company's press conference at the New York International Auto Show. The Auto Show Beat! He also noted that the German sport car maker also offers more choices than its competitors. "Our line-up has never been better balanced between two and four door models," added Zellmer. He believes the new models will help Porsche continue to expand sales in North America, which have been just fine thus far. In March, Porsche sales increased by 3.6% and for the first-quarter are up 3.9% over last year when sales were also strong.