"The saloon sprints from 0 to 62 mph in 6.5 seconds and top speed is limited to 250 km/h (155 mph), using only 8.0 litres of diesel fuel over a distance of 100 km in the EU combined cycle (all figures apply to the automatic transmission supplied as standard).
Full Engine Specifications"

So let's say for 20 gallon Tank:

1 US gallon = 3.7854118 litres.

3.7854118 x 20 = 75.708236 litres

75.708236 / 8 = 9.4635295

9.4635295 x 100 = 946 miles per tank!

With city driving let's discount that to 850 miles. I like.