EfficientDynamics Auto the Overall Winner Green Car of the Year 2012. The 320d model has a UK combined fuel economy of 56 mpg and emissions of 110g/km. References 3 Series E90 Euro NCAP large family cars Coupés Sedans Station wagons Hardtop convertibles Partial zero-emissions vehicles Cars introduced in 2005 2010s cars Touring cars sv:BMW 3-serie#E90