I've just picked up another 147 1.9JTDm (6 speed - 150 Bhp), as a courtesy car.
This is the 4th one I've had as a courtesy and yet it still surprises me everytime.
90 mile journey back from Portsmouth to North London (A3/M25), foot to the floor most of the way and it still knocks out 45mpg.
I've owned two 2.0TS's and two 3.2V6's. Both of which can be heavy drinkers when thrashed, but for some reason the diesel loves it!
Stick it on cruise control and it will give you up to 60mpg.
Other than the start up, its very quiet and if I'm truthful it will certainly give my V6 a run for its money at the lights.
I'm a petrol-head through and through and I've driven pretty much every car on the road and I have to say this is the only diesel I've ever praised. There's good reason Alfa diesels are now considered to be better than the likes of BMW.
If you can cope with the Focus TDi, then you'll have a hoot in 147JTDm.
I've driven both and there's certainly no comparison.
It might be a diesel but this baby is an Alfa through and through.