I've driven a few older Alfas as you may know, The Giulietta is a lovely looking car, and it's far, far better than the Brera which was a dead badger dynamically, even if it was sex on wheels!
The 1.9mulitjet i've got in the Punto is pretty warm, so i would imagine the latest Alfa version should shift pretty well, and the Guilletta comes with a LSD as standard. I get 45mpg on the twisty hell to work, and about 50 on the motorway.
Ps. I'm completly biased when it comes to Alfas, but one day i'll have my Alfa bike van: