[2] From 1963 the circuit held the Rome Grand Prix, and in 1967 a new loop was added when the track became the property of the Automobile Club d'Italia (ACI).

The track is also used by ACI for public driving safety training courses and, in autumn of each year, hosts a vast flea-market specialising mainly in vintage automotive spare parts.

The circuit is home to simulation software developers Kunos Simulazioni, who occupy a pit garage as an office.

[3] The outright unofficial all-time track record for the current International Circuit layout is 1:12.804, set by Anthony Davidson in a Honda RA106, during Formula One testing in April 2006.

[6] As of May 2024, the fastest official race lap records at the ACI Vallelunga Circuit are listed as: