What Mpg To Expect From 2.0 Tdci?

We picked up our 58 plate 2.0 tdci titanium on Saturday.

I am somewhat surprised at the mpg....it doesnt seem right to me.

The car has only done 10000 miles, and not a lot of those in the last year.

I drove 45 miles 95% motorway today and drove no different to how i drive my Golf 140bhp PD diesel where i get 55-60mpg easily.

I got 46mpg, i wasnt going much above 75 at all. We bought this for our second car, so its predominantly used by my fiancee,

she has been using it around town this week and only acheived 30mpg, she hasnt got a heavy right foot either.

I dont expect 60mpg or anything, but i thought i should easily be getting 50+mpg on the motorway when not pushing it,

and 30mpg is not alot more than what i used to get in my old 306gti-6 which did guzzle petrol.

Does this sound right...its still under warranty?

The car runs well, everything feels very tight still.

Thanks in advance

Dave