Volkswagen AG has launched its Passat BlueMotion concept car at the 2014 Detroit Auto Show. The vehicle is equipped with a new 1.4-litre turbocharged petrol four-cylinder engine, coupled with active cylinder management, start/stop, a coasting function and a dual-clutch DSG transmission. The model is likely to be rated at 42 mpg on the highway, better than the 34 mpg available from the standard, automatic-equipped Passat 1.8T.