The headline property in the Article Schema (referred as SameAs schema) uses the Wikidata item description. But that description sometimes is not present,
and when it's present it's not descriptive enough - usually when description exists it's usually one - two words, or it says "Wikimedia list article" or "Wikimedia disambiguation page"
BTW, the best one I found so far is: https://en.wikipedia.org/wiki/Fiat_Ducato -> 2.5 diesel 5 speed gearbox 1993
Instead of Wikidata item description we could use the Article summary which usually provides much better summary of an article (same what we use in the Page Previews).
Below (in comments) can find some results from Polish, Spanish and English Wikipedias.
This faces the same problem as T142090 - page summary endpoint is in REST and there is not yet a recommended way for PHP to access the REST endpoints.