But the unremarkableness of this E39 M5 disguises something very, very cool. This one has had its BMW V8 swapped out for a Volkswagen W10. This is the only car ever to have this engine fitted.

The beauty behind the way the 5 Series has always delivered its performance is how it's been done in secrecy. Sure, the M5 ...

The proportions are bob on, and combined with the kidney grille, bulged bonnet and sleek body kit, the E39 will always be one of BMW’s defining moments. No wonder Mate Rimac dailies one.

I was fortunate enough to drive a great many of BMW M's products the last 12 months. From the contentious new M5 (including the cool Touring), the classic E39-generation M5, to the now ...