Penske PC-23

The Penske PC-23 was an open-wheel CART IndyCar racing car built by Penske and designed by Nigel Bennett as a refinement of the team's 1993 car, the PC-22. It raced in the 1994 IndyCar season for Penske Racing and in 1995 for Bettenhausen Motorsports, and it is counted among the most dominant open-wheel cars ever built: Al Unser Jr., Emerson Fittipaldi and Paul Tracy took 12 wins from 16 races, 10 pole positions and 28 podium finishes, and Penske won both the Constructors Cup and the Manufacturers Cup. Unser also won the 1994 Indianapolis 500 in it. For that single race the car was fitted with the secretly developed Mercedes-Benz 500I pushrod engine, which used a loophole in the Indianapolis 500 rules and caused an uproar that is recognised as one of the triggers of the CART and IRL split. The regular engine was the Ilmor Indy V-8. The PC-23 made a final appearance at the 1996 U.S. 500.