Re: Why is the 159 TI diesel economy so poor ?
Just sold my Alfa 159 1.9 diesel partly due to the poor fuel consumption and partly due to the high seating position which was getting on my nerves. The Alfa had done 20k miles and I managed to get the average up to 42mpg with a very light foot and never really exceeding 80mph.
Just bought a Saab 9-3 diesel, which is the same engine and it also has 20k miles on it. Same 100 mile commute every day and I'm getting 55mpg with the same light foot. Seats are more comfy and I'm £5k better off by "trading down"
While the weight issue has been much discussed and to some extent discounted and the DPF discussion is endless, my guess is drag also has something to do with it. Perhaps it's the aerodynamics or possibly the wheels, but both our Mazda and the Saab, coast a lot further and faster down the same hill, with nill power. Come to think of it every other car I have had has taken longer to roll to a stop, which implies something (if it's not the weight) is holding it back and therefore requiring more fuel.
Just a thought and good luck to you all working it out.