The Spaniard has moved away from the quantity 29 that he had used for his debut in 2017 and opted for the 66.
C is the quantity with which McLaren gained his first Indy victory with Mark Donohue in 1972.
Donohue used the quantity 66 when of his 5 appearances with Indy 500 with Roger Penske and his two debuts with a McLaren chassis.
His solely victory was in 1972 when, after a high-wear race, he was in a position to lead the final 13 laps and win a victory with a brand new common velocity document.
The Alonso McLaren for the Indy 500 will probably be geared up with Chevrolet's twin-turbo V6. Chevy is the present title winner after successful Will Energy's victory at Penske final Could.
Alonso was one of many star sights of his first try on the Indy 500 in 2017, after qualifying in second place after which main 27 laps earlier than the primary. expiration of his Honda engine.