9. Subaru Legacy B4 (1991-1994)
In the early 1990s, Subaru collaborated with Porsche to refine the Legacy into an unexpected performance sedan. Porsche engineers tuned the turbocharged EJ20 flat-four engine and optimized the four-wheel multilink suspension geometry for improved agility and stability. The 1994 Legacy B4 benefitted from enhanced chassis stiffness, sharper handling, and power output around 236 hp—courtesy of Porsche’s engine-management input.
Though overshadowed by the later Impreza WRX, the Legacy B4 laid groundwork for Subaru’s rally prowess, offering a balanced ride, precise steering, and robust braking. This quiet partnership showcased Porsche’s ability to elevate a mainstream sedan into a driver’s car without fanfare.