The Alfa flat-12 engine was too wide for ground effect designs in that the opposed cylinder banks impeded with the venturi tunnels, so Alfa designed a V12 for 1979. It was the fourth 12-cylinder engine design that propelled the Austrian in F1 since 1973. Lauda's 1979 F1 season was again marred by retirements and poor pace, even though he won the non-championship 1979 Dino Ferrari Grand Prix with the Brabham-Alfa. In the single-make BMW M1 Procar Championship, driving for the British Formula Two team Project Four Racing (led by Ron Dennis) when not in a factory entry, Lauda won three races for P4 plus the series. Decades later, Lauda won a BMW Procar exhibition race event before the 2008 German Grand Prix.