ATLANTA, May 2, 2017 /PRNewswire/ -- Porsche Cars North America, Inc. (PCNA), importer and distributor in the United States of Porsche 911, 718 Boxster and Cayman, Panamera, Cayenne, and Macan model lines, today announced April 2017 sales of 5,529 vehicles. This is a 2.2 percent increase...