Porsche have released the latest generation of their 911 modelm the Carrera 991. The car is slightly longer than its predecessor, includes a lighter and more aerodynamic aluminum body and features the side mirrors now located on the top of the door. The interior has been built to be more user friendly based on that of the Panamera with a new seven speed manual transmission or the dual clutch PDK transmission. The Carrera model outputs almost three hundred and fifty horsepower out of its three point four liter flat six engine whilst the Carrera S model outputs almost four hundred horsepower out of its three point eight liter flat six engine.