The Volvo ÖV 4 was the first car built by Volvo. The designation ÖV 4 stands for "Öppen Vagn 4 cylindrar" in Swedish, which means Open Carriage, 4 cylinders. The model ÖV 4 has later often been referred to as "Jakob" but that was just a name for one of the 10 pre-series ÖV 4 that was ready on 25 July 1926, Jakob's name day. All 10 prototypes were assembled in Stockholm at the company AB Galco, Hälsingegatan 41 where Gustaf Larson worked at that time. Only one of the 10 pre-series cars manufactured during 1926 was saved for posterity and is housed at the Volvo Museum in Gothenburg, Sweden.

Erik Gustaf Larson was a Swedish automotive engineer and the co-founder of Volvo. He held a Master of Science (M.Sc.) degree in mechanical engineering from the Royal Institute of Technology in Stockholm.