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 ...

The BMW 520d Efficient Dynamics is the ... So far, then, very worthy but not very evo. And with M Sport options pointedly unavailable for the 520d ED, this will never be a rousing drive ...