The BMW M240i xDrive, one of our favourite coupes, has undergone a revamp, but not where you might expect. A redesigned dash, new screens and updated operating system are the big changes, meaning the big 3.0-litre turbo in-line ‘six’, all-wheel drive and superb chassis balance remain. But that raises a question: in the four years since release, has BMW’s smallest coupe kept up with the times?