Volvo does not build many cars like the Volvo 780 with gasoline engine, made in small numbers. Its designer of record is Nuccio Bertone.
The engineering
Under the skin sits gasoline engine. Kerb weight is 1547 kg. These are manufacturer figures carried by Wikipedia and Wikidata, not road-test measurements.
Where it sits
Its Volvo stablemates include the Volvo 144 and the Volvo 264 TE.