Honda, BMW, Ferrari, Renault and TAG-Porsche engines which were producing well over in race trim (the BMW was said to be the most powerful qualifying engine at around ). AGS only participated in two races during the 1986 season, with Ivan Capelli retiring from both the Italian and Portuguese Grands Prix. 1987 1987 would be the last season the Motori Moderni engine would be used in Formula One. Minardi, who had retained Nannini after an impressive debut season, replaced de Cesaris (who had moved to Brabham) with Spanish driver Adrián Campos who brought considerably more money to the team than driving talent. Once more no points were scored throughout the season, despite some spirited drives by Nannini which only resulted in 11th-placed finishes in Hungary and Portugal. The engines, now rated at after the introduction of the FIA's mandatory pop-off valve aimed at limiting the turbos power to 4.0 bar, were often struggling against the V8 Cosworth DFZ powered cars. At the 1987 Australian Grand Prix in Adelaide, the Motori Moderni had its last ever Formula One race. Nannini qualified an impressive 13th on the grid only 3.434 behind Gerhard Berger's pole winning Ferrari Unfortunately his race only lasted a few hundred metres as he was pushed into the fence just out of the chicane after the start. Campos qualified 26th and last (3.42 seconds slower than Nannini), with his race ending with transmission failure after 46 of the scheduled 82 laps. With being the final year for the turbos in Formula One (until ), Motori Moderni pulled out of the sport at the end of 1987 rather than try to adapt the engine for an even lower pop-off valve limit of 2.5 bar and a lower fuel limit of just 150 litres. As a result Minardi were forced to use the Cosworth DFZ engine in 1988. Subaru In late 1988 Chiti was commissioned by Subaru to design a new 12-cylinder boxer engine, known as the 1235 for the new 3.5-litre normally aspirated F1 regulations. This was tested by Minardi. The Japanese car company then bought the Coloni team. The program was a complete disaster. In June 1990 Subaru withdrew and sold the team back to Enzo Coloni. The engine found use in the 1989 Jiotto Caspita prototype sports car before it was used by Subaru for the 1990 season. Sportscar Racing After abandoning Formula One, the engines found use