The entire BMW 1 Series offers buyers the perfect balance between a luxury coupe and a sports car and includes the brand’s least expensive models. The 2012 BMW 135i is a performance-oriented model in the 1 Series that is offered in both Coupé and Convertible body styles with luxury and performance packages being offered as optional. In terms of size, the 135i falls neatly in between the 3 Series and the Mini Cooper and is offered with a rear wheel drive powertrain.