What engine are we talking about here? A 2-liter 16V TS from a 156? In that case, it's not uncommon to see consumption like that if you do a lot of driving in traffic or like to whip it a bit.
If you only do long drives on the motorway, you should see less consumption than what you do.
You'll have to convert these figures to mpg for yourself, but my 147 2.0 was always hovering around 8-10 liters/100 km.