On paper, the most economical of the internal combustion models are the diesels. The two-wheel drive 18d and four-wheel drive 23d should both be capable of mpg in the mid 50s. Next up is the two-wheel ...

The diesel range apes the petrol one in that there are two options. First up is the 18d, which gets 150hp. It’s the slowest engines in the X1’s arsenal, but still manages a respectable sub-9.0 second ...