There’s a risk though that slotting in a humble four-cylinder diesel engine, such as you’ll find in the 520d ... in M Sport trim. Power comes from a 2-litre version of BMW’s modular family ...

Note: 520d pictured. Image: BMW Until now fuelled solely by diesel or electricity in the case of the i5, BMW has re-introduced conventional petrol propulsion to the new 5 Series with the ...