Stefan Johansson, Onyx, Estoril, 1989 Link to this image full-size: https://www.racefans.net/2023/06/28/what-were-formula-1s-greatest-unexpected-underdog-triumphs/portugal-grand-prix-estoril-por-22-24-09-1989-5/Stefan Johansson, Onyx, Estoril, 1989Advert | Become a RaceFans supporter and go ad-freeStefan Johansson, Onyx, Estoril, 1989Previous ImageNext Image