2017 V40 diesel hatchback
 

I have just bought a Volvo V40 diesel hatchback on a 2017 66 plate, it is a V40 Diesel hatchback, D2 (120) R Design pro 5 dr Geartronic automatic, it was advertised as doing 74MPG, can anyone advise me of the true mileage I am likely to get out of this car as on the mileometer it is only showing as doing 44mpg, does anyone know what I should expect ??
Thanks