Notes:
A group of by-passers including a woman pushing a baby stroller with a seven-months-old child, was hit by an Alfa Romeo GTAm 1750 driven by Spartaco Dini, while passing in the village of Ospedaletto di Firenzuola, province of Florence, Italy. The woman, named Sonia Poli, 24, and three other people, Elisabetta Pifferi, 33, and her sons Stefano and Filippo Allegri, aged four and two, were seriously injured. The child in the baby stroller, named Lorenzo Zini was killed at the scene. Two other members of the group, Dr. Carlo Zini of Bologna, father of the young boy, and Piergiorgio Allegri of Ravenna, were unscathed.

The accident happened at about 18h00 on Friday, 26 June 1970. Possibly Lorenzo Zini is the youngest ever victim of a motorsport accident.

It is likely that the accident happened during a private test (test on public roads), preparing the race along the course of the "17° Circuito del Mugello", that was scheduled to be contested three weeks later, on 19 July 1970. A 27-year-old professional driver from Greve in Chianti, province of Florence, Spartaco Dini was driving with his girlfriend Barbara Benelli, 19, from his side. The first newspaper reports indicated that she was timing the tests. Both of them escaped injuries.

It was reported that Dini who at the time was an Autodelta-Alfa Romeo works driver in both the European Touring Car and the World Sportcar championships, wasn't entered in the race in any category. Just at the beginning of June 1970, Alfa Romeo managers decided to move away him from the works team, because of an improper behaviour with a race marshal during a touring-car event at Imola. The team did not allow him to drive in the 24 Hours of Le Mans on 15 and 16 June 1970, and he was replaced by Teodoro Zeccoli, who shared a factory Alfa Romeo 33/3 with Carlo Facetti in the 24-hour race.

The roads were still opened to regular traffic along the Mugello Circuit, it was a private test. The Alfa Romeo GTAm 1750 driven by Dini was registered in Milan, reg. plate number MI-K91850. According to different accounts, the owner of the car was team Autodelta-Alfa Romeo, this has not yet been confirmed. "Free practice" was an extremely dangerous activity with racing cars in public road circuits before the start of official practice sessions, which was consented in Italian hillclimbs and road races until the late 1980s.

After the accident Dini was arrested and tried. He returned to active racing only six months later, driving under the pseudonym of "Paco", and competing with a Spanish license.

According to Dini's interview published in the book "Benzina e cammina" by Andrea Delli Carri, Fucina Editore, the driver said that he wanted to drive on the Mugello road course before going to Thruxton for a Formula 2 race in which he was entered by Team De Tomaso with the De Tomaso 103-Cosworth, designed by engineer Gianpaolo Dallara - this is incorrect, possibly it must be the Rouen-les-Essarts race, scheduled to be contested on Sunday, 28 June 1970, and not the Formula 2 race at Thruxton, which had been held in March of that year. Dini also confirmed to be entered also in the Circuito del Mugello road race, but it has not been clarified what car and which team he was scheduled to drive for. He went to the twisty public roads 66-kilometer circuit in an Alfa Romeo GTAm 1750 with his girlfriend, who was the younger sister of the drivers Roberto and Carlo Benelli, who at the time was a famed sportscar and touring-car driver known with the nom de course of "Riccardone". During the test, on the approach to a left bend Dini's car slid on the right side and crashed into a group of by-passers. Reportedly the driver found a dog in the center of the road and lost control of the car. He vainly tried to avoid them getting a spin, but hit the people backwards. The baby stroller knocked down and the child was thrown out, landing several meters ahead. Despite the immediate intervention of his father, who was a doctor at the Ospedale Maggiore of Bologna, the young boy was killed almost instantly. The car crashed into a small tree, ending into a ditch.

After about two months of imprisonment at Florence jail, he left Italy and moved to the Netherlands, living at his former team mate and friend Toine Hezemans' home, and then in Spain, where he gained a new Spanish racing licence. But he was not allowed to race in Italy for years.

This accident is considered one of the final causes of the stop of the Circuito del Mugello race, which last edition was held just in 1970.

• Book "Benzina e cammina" by Andrea Delli Carri, Fucina Editore, Milano, Italy, 2004, Spartaco Dini interview, pages 377 and 387.
• Book "I Campioni del Mugello" by Francesco Parigi, Cromografica Roma, 2010, pages 394/397.
• Magazine Autosprint issues N. 26 of July 1970.
• Magazine Autosprint issues N. 27 of July 1970.
• Newspaper Il Resto del Carlino, issue of Saturday, 27 June 1970, article "Corridore d'auto falcia 5 persone: ucciso un bimbo" by Rosario Poma.
• Newspaper La Stampa (Turin, Italy) issue of 27 June 1970, page 15, article "Il pilota S. Dini in carcere La sua auto ha travolto 2 famiglie", retrieved by website http://www.archiviolastampa.it/ .
• Website AUTOSPORT → Forums → The Nostalgia Forum, thread "Baby killed at the Circuito del Mugello", page http://forums.autosport.com/index.php?showtopic=73183 .
• E-mail by Francesco Parigi, dated 07 September 2004, citing Pierluca Pieri.
• E-mail by Francesco Parigi, dated 12 October 2004.
• E-mail by Francesco Parigi, dated 18 November 2004.
• E-mails by Pier Paolo Garagnani, dated 07 September 2004 and 06, 07, 11 and 12 October 2004
• E-mails by Nanni Dietrich, dated 07 and 11 October 2004 and 12 and 17 November 2004.