what displacement 2351 or 2378 ?

hello pennsylvania , the circolation booklet indicates 2351 . is a mistake .? best regards thank you .

Your circolation booklet (owner's manual) is more likely to be correct than my Google search. Sometimes the factory makes slight changes in combustion chamber (engine) that would explain the small changes in displacement volume. That difference of 27cubic centimeters (cc) is barely 2 cubic inches (cu. in.). I don't think it makes a difference unless you order parts, in which case the parts person can figure out which engine you have by looking at the eighth digit of your "Vehicle Identification Number" (VIN). In the USA, our cars have that VIN number tagged on the dash so you can see it from outside the car, looking through the driver's side windshield. Incidentally, my Grandparents, with names like Oliveri and Infantino, immigrated from Sicily a hundred years ago. Best Wishes to you in Italy.

thanks for the reply. nice to know grandparents , this approaches. later,if you need it,can i contact you? thank you very very much stefano