The 2014 BMW 4 Series 420d M Sport combines refined engineering with the distinctive styling associated with the M Sport trim. This model is powered by a 2.0 litre diesel engine that meets Euro 6 emission standards, ensuring it remains compliant with modern environmental requirements. The vehicle is equipped with several practical enhancements, including 19 inch M Double Spoke style 442M alloy wheels and folding, automatically dimming door mirrors. Inside, the cabin features the BMW Advanced loudspeaker system and enhanced Bluetooth telephone preparation with a USB audio interface, providing seamless connectivity for both media and communication. The inclusion of high beam assistant further assists the driver by automatically managing lighting conditions during night driving. This vehicle offers a balanced driving experience that prioritises both efficiency and performance. It achieves a notable fuel economy of 60 mpg and maintains low CO2 emissions, making it a sensible choice for those mindful of running costs. Despite its focus on efficiency, the car remains capable, accelerating from 0 to 62 mph in 7.3 seconds. Practicality is also a key strength, as the design provides a large boot space suitable for everyday requirements. Furthermore, the vehicle falls into a low insurance group, which helps to keep overall ownership costs manageable compared to many other cars in its class.