Porsche Automobil Holding said first half to July 31 unit sales fell 3.1%, with revenue down 3.3% to 2.9 bilion euros. Cayenne was the best selling model with 13,100 units sold, a drop of 22%, and 911 sales fell 45% to 7,400 units. The new Panamera sold 8,200. The company still expects fiscal year sales will exceed the prior year's 75,238 vehicles