It was (like I've mentioned before) part of the name on that source where I've found it.
Maybe or probably incorrect and unusual for a Russian car, but what if it was made for a GDR apparatchik and was baptized exactly with that name?
As long as I've got no other designation I leave it like that, but nevertheless thanks for your advice...
BTW: "Delfin" written with "f" is German as well..
And "Delphin" with "ph" isn't Russian either.
@faksta or other puzzlers which are able to google in cyrillic words: would it possible to do a little more research?