They were meant to be identical – the M3 and M4. You are not meant to be able to tell them apart; aside from the very obvious fact that one is a coupe and the other a saloon. Sadly, BMW never produced a Touring – but someone did.
The F81 – the model that many waited for. A Touring, with performance and pace that never could doubt about. The perfect combination. The perfect car. The Ultimate Driving Machine!