The Penske PC-20 was a CART Penske Racing car which competed in the 1991 and 1992 seasons. In 1991, it raced in all seventeen events, scoring 3 wins, two with Rick Mears, and one with Emerson Fittipaldi, placed 4th and 5th at the season's end respectively. The most remarkable success of the PC-20 was the 1991 Indianapolis 500 win by Mears, his 4th win at the Brickyard. The car was designed by Nigel Bennett, his 4th for Penske Racing. In 1992, it also raced alongside the Penske PC-21.