I found a very remarkable name for this yellow box on wheels: Urbanina Torpédo. Not very applicable but perhaps this is what you want to hear.
That's not what I was looking for, no. I believe that's just a translation of "Urbanina Roadster".
No, there were 3 different versions of the Urbanina and each had a different name. The first was the "Primavera" ("Spring") and this is the second one, referring to it being a convertible.
Read the article fully where you saw the 'Torpédo' name and I believe you'll find it!