The highly successful PC-23 that competed in the 1994 IndyCar season. was modeled after its predecessor, the PC-22. The Penske PC-23 was one of the most dominant open wheel race cars ever developed. It won both the 1994 CART season, and the 1994 Indianapolis 500 with Al Unser Jr., together with Emerson Fittipaldi and Paul Tracy scoring 12 wins out of 16 in total, collecting 10 pole positions and 28 podium finishes, in a season that saw Penske also take the Constructor's Cup, and the Manufacturer's Cup with the Ilmor-Mercedes-Benz engine.