Al Unser - Fourth Indy 500 Victory

Fourth Indy 500 Victory

In 1987, Penske's slate of drivers included Mears, Ongais and Danny Sullivan. Unser was dropped.

Ongais crashed into the wall during the first week of practice, suffering a serious concussion, and was declared unfit to drive. Penske then turned to Unser to fill in. Both the new Penske PC16 race car and its new Chevrolet-Ilmor engine had been unreliable throughout testing, practice and qualifying. Penske elected to race the backup car, a 1986 March-Cosworth, the same combination of chassis and engine that had won the previous four Indy 500s. The year-old March was removed from a Penske Racing display at a Sheraton hotel in the team's hometown of Reading, Pennsylvania, and hurriedly prepared for a return to active competition.

At start Unser was in the 20th position. On a day when heavy attrition felled most of the field's front-runners, including the overwhelmingly dominant Newman-Haas entry of Mario Andretti, Unser worked his way steadily forward and took the lead on the 183rd lap, after Roberto Guerrero's car stalled on his final pit stop. Averaging 162.175 mph (260.995 km/h), Unser bested a charging Guerrero by 4.5 seconds to win his fourth Indy 500, only five days before his 48th birthday. In doing so he tied Foyt as the winningest Indy 500 driver and broke brother Bobby's record as the oldest Indy winner.

Unser rode the wave of his fourth Indy victory to secure a ride at Penske for the Michigan 500, Pocono 500, and Marlboro Challenge for 1987. It also helped him secure a ride at the three 500-miles races (Indianapolis, Michigan, Pocono) in 1988 and 1989 as well.

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