Seems like it's been swapped about a bit, the engine looks to me to be a metro engine or from a 90's cooper due to the flat thermostat housing, which would make the engine a 1275.
Values hard to say really as you're in Budapest so the pricing would be different to the uk. any more photos of it?
Uploaded the pics to google, hope you can see it.
https://photos.app.g...j7fgeQRXShjKpr9
The car is 200+ km from me, so I want to be sure what I get before I travel. Brake servo and possibly disc brakes are good news, also the 1275 engine if it is right. As far as I know these engines was painted to red in factory, instead of 850/998/1098's green.
Could it be a HIF carburettor ?
What I don't like is the instrument panel, the alternator mounting, the repainted body.