The German automaker celebrated the world premiere of its new 911 on the eve of the Los Angeles Auto Show. It is the eighth generation version of this emblematic Porsche model, and it is already available to order. The most powerful model, the Porsche 911 4S, has a top speed of 308km/h and does 0-100km/h in just 3.6 seconds (3.7 seconds for the Coupé).