It was powered by a 250 hp (190 kW) 2.75 L (168 cu in) Coventry Climax FPF four-cylinder, but later used an Aston Martin six-cylinder engine, installed by automotive mechanic and engineer Joe Huffaker, after the car had been by Jim Kimberly to Kjell Qvale.

[1][2][3][4][5][6] In 1961, Brabham entered the famous Indianapolis 500 oval race for the first time in a modified version of the Formula One Cooper.

It had a 2.7-litre Climax engine producing 268 bhp (200 kW; 272 PS) compared to the 4.4-litre, 430 bhp (321 kW; 436 PS) Offenhauser engines used by the front-engined roadsters driven by all the other entrants.

Jack qualified a respectable 17th at 145.144 mp/h (pole winner Eddie Sachs qualified at 147.481 mp/h), and while the front-engined roadsters were much faster on the long front and back straights, the rear-engined Cooper's superior handling through the turns and the shorter north and south sections kept the reigning World Champion competitive.

[7] In 1963, Pedro Rodríguez entered the Indianapolis, in an Aston Martin-powered Cooper T54, but failed to qualify.