With fierce competition from Audi, BMW needs to up its game, so has been trying different models, some of them, such as the 5 Series GT, being slightly radical. But this concept for a 4 Series Coupe looks like a good fit with the model lineup, and reaffirms BMW's performance heritage. The 4 Series Coupe, based on the existing 3 Series, is a little longer and boasts wider tracks on the front and rear wheels, suggesting a strong performance play.