used in such as the Honda, BMW, Renault and TAG-Porsche engines, which were reportedly producing in excess of . As a result, neither Haas Lola drivers Jones or Patrick Tambay were able to exploit the good Lola chassis due to the underpowered engine, scoring only 8 points for the season, with a best finish of 4th for Jones at the Austrian Grand Prix (Tambay finished the race in 5th, the race also seeing the first points scored for the new engine). The Duckworth designed GBA V6 was more successful in , its final year of competition. With the Haas team leaving Formula One, the engine would be supplied exclusively to the Benetton team (who had used the BMW engine with success in 1986). The restriction of turbo boost to just 4.0 Bar in 1987 helped the Ford engine to be more competitive, although some unreliability had crept in with 9 engine or turbo related retirements during the season. Drivers Thierry Boutsen and Teo Fabi were able to claim one podium finish each during the season, at Austria (Fabi) and Australia (Boutsen), while Boutsen led his first Grand Prix when he briefly led the Mexican Grand Prix. With turbo engines to be banned by the FIA from , Ford-Cosworth abandoned the V6 turbo at the end of 1987 and once again concentrated on their new 3.5 litre naturally aspirated DFZ V8 that had been raced through 1987 by teams such as Tyrrell and the new French Larrousse outfit. The DFZ was a development of the original DFV, while Benetton would have exclusive use of its successor, the DFR in . Other Cosworth engines The Cosworth DFV, and other engines based on the same design, became the standard in Formula One and many other types of racing and made Duckworth a very wealthy man. In 1980 he sold his majority stake in Cosworth for tax reasons but retained his position as chairman of the company; relinquishing the job to Mike Costin seven years later for health reasons. He was appointed 'President' of the company on his retirement, and remained interested in engines and engineering until his death. Keith's son Roger joined his father's company and worked as a development engineer in the Road Engines division being a key part of the team that delivered the YB family of engines for the Ford Sierra RS Cosworth and Ford Escort RS Cosworth vehicles. Roger