All thats known about the Giulia is that its due "2012" and Marchionne suggested that the styling might be signed off in December 2010.
Its on a stretched C-Evo platform, so expect something around the same wheelbase (2700mm) as the present 159, compared with the 2634mm of the Giulietta.
There will be a 4 door saloon and Sportwagon/Estate.
Front wheel drive. Probably 4wd version, C-Evo platform is designed for it - possibly held back if the SUV materialises.
Engines pretty much as now at base level.
As they are targetting 85,000 sales of Alfa in USA by 2014, there is even a chance they could produce the car in a Chrysler factory!
1750TBi (possibly 235 but nothing mentioned yet about going to higher output MA2 or twin-turbo)
An engine described as AirTorq 1.6-1.8 litres, 125-140 bhp maybe? (In FPT Technology list for 2014)
"Chrysler WGE 2.0-2.4L 165-186 bhp" (FPT plan)
3.3 Up to 3.6 V6 Pentastar derived, 273-288 bhp - not sure which end it will be driving
2.0 MultiJet 2 170 bhp
2.8L 197 hp? (In FPT plan for 2014)
3.0 V6 diesel 225-250 hp.
I don't see the price being anywhere near as low as the 159. At todays values I can see it starting at £25/26k and rising rapidly to over £30k with the top premium Ti/Lusso with 3 litre engine being at least £35k.
Time will tell.
I'm pretty sure they haven't finalised the design language yet - Giugiaro was destined to show a concept at Geneva this year but it never showed up because Ital Design was sold to VW Group leaving only the concept Spider and the ghastly Bertone coupe to be shown.
And just to finish - the Giuletta is not as roomy as a 159. Its not far behind but its 30mm short overall on width and less legroom in the rear and the boot is smaller. It possibly feels to have a longer cabin compared with a 159 saloon but thats an inevitable effect of the hatchback design. It seems to be a reasonably good packaging exercise however.
The Giulietta Cloverleaf is only 35kg lighter than a 159 1750TBi saloon, presumably the result of having a tailgate?
Some of the above may be rumour - but its all been published somewhere or taken from Fiat Group reports