If one is good, two must be better, right? Or twice as good. The question is whether that simple equation adds up for BMW's upgraded 1 and 2 Series siblings – the former, a range of five-door hatches, ...

Can a car company show off? It seems absurd; the kind of embarrassing, unedifying behaviour that only ego-driven, status-obsessed human beings engage in. And yet look at BMW’s new 8 Series, with its ...