the 540i is the most potent petrol-powered models offered in the UK, with the four-cylinder 530i at the foot of the range. These are the latest modular family of engines, all turbocharged. BMW has ...

which will provide what BMW refers to as "between 28 and 32 real-world kilometres". Run out of range, or simply use too much throttle, and the 2.0-litre petrol engine comes into play, adding 135kW and ...