In engineering terms, there is no doubt that BMW has rediscovered its mojo. For years BMW was the go-to brand for those wanting genuine driving pleasure in practical, not entirely unaffordable form. And then it all changed: BMWs became less distinct, more like Mercs or Audis and, in some cases, not as good. But now it’s back: the 3 Series is brilliant to drive, the 5 scarcely less so. Even the 7 is the best yet to wear that badge.