Thanks both very much for your answers. It's like one of you are the devil in my head and the other one the angel. Buy it!, don't buy it!
Actually, a lot of people in Spain talks bad about Alfa, they said they're unreliable cars, they need a lot of petrol, etc., etc. When I buy my first Alfa, 3 years ago, an old Alfa Sprint 1.7 boxer 1988, with 60.000 km (40.000 miles) I tought I would use it for three or four months (I was OK, I paid for it 800 Euros and no manteinance was needed) but after driving her for more than 40k miles without never ever any problem eek! (ok, only minor electrical problems 14 years are 14 years and a speed indicator that doesn't work (but I' ve never tried to repair it
)), I know she has been the best investment of my life and I am so impressed that when this friend offer me the car I started to think about it seriously. Wow, another alfa!!!
(also the petrol consumption is not so high, ok inside city is better not to start the engine but outside: you want to go fast you've to pay for it; but driving 120 km/h (90 mph) it's about 50% more (in money) than a 2.0 HDI Berlingo (that I use for working), so it's far from a high waste)
Now I don't know what to do, I've been told by the actual owner that I could drive the car for a couple weeks in october an I've accepted the offer, I'll check everything and will ask you again if needed.
Again, thank you very much, I'll inform you about the issue