Winner of the national sports car title for the previous two seasons, the wealthy Robert Bonomi made his debut in the World Sportscar Championship in the 1954 Buenos Aires 1000Kms when sharing a private Ferrari 625TF with Carlos Menditéguy. They ran second before their gearbox failed during the closing laps.
Bonomi’s best international result was fifth in the 1957 Buenos Aires 1000Kms, run on a street circuit in the eastern suburbs, but the works Maserati 350S he shared with Luigi Piotti was a full seven laps off the pace.
Argentinian champion once more in 1959, he drove Scuderia Centro Sud’s Maserati 250S-powered Cooper T51 in the 1960 Temporada races. Certainly not the slowest of the locals in the Argentine Grand Prix, Bonomi enjoyed a quiet race to finish 11th in what was his only Formula 1 World Championship race.
Running fifth in the subsequent Formule Libre Buenos Aires City GP at Córdoba, Bonomi showed his disgust when ordered to give the car to Menditéguy at a pitstop. His replacement put on a virtuoso display to climb to third only to break the gearbox in the process.
Bonomi retired a Fiat-Abarth 750 from that year’s Targa Florio but withdrew from the sport to concentrate on his various business activities in Argentina.