BMW claims up to 38.2mpg with 168g/km of CO2, to the V8’s 28.5mpg and 229g/km. The 840d xDrive goes even better at up to 45.6mpg and 162g/km, though that gulf is hardly vast. Forward of the A ...

In 840d form, the 8 Series is in a class of its own: a diesel luxury coupé that’s relatively cheap to run, offers very strong performance and is capable of covering long distances between fill-ups.

In 840d form, the 8 Series is in a class of its own: a diesel luxury coupé that’s relatively cheap to run, offers very strong performance and is capable of covering long distances between fill-ups.