Bianchi was born in Milan, Italy, but moved to Belgium in 1946 when he was still a child, with his father who was a race mechanic working, before the Second World War, in the Alfa Romeo competition department.
Bianchi naceu en Milán, Italia, pero trasladouse a Bélxica en 1946 cando aínda era un neno, co seu pai que traballaba como mecánico de carreiras, antes da Segunda Guerra Mundial, no departamento de competición de Alfa Romeo.