Guido Meregalli was an Italian racecar driver, known from several GP victories between 1920 and 1926.

He had victories in the 1920 Grand Prix season

1920 Grand Prix season

The 1920 Grand Prix season consisted of races in the United States and Italy.-Other Grands Prix:...

, winning the Targa Florio

Targa Florio

The Targa Florio was an open road endurance automobile race held in the mountains of Sicily near Palermo. Founded in 1906, it was the oldest sports car racing event, part of the World Sportscar Championship between 1955 and 1973...

 1920 in a 4441 cm³ Nazzaro GP.
Driving a Diatto

Diatto

Diatto was an Italian car maker founded in 1905 in Turin but its history started 175 years ago.1835-The year the company is founded.- In 1835, in Turin, on the banks of the river Po, Guglielmo Diatto founds a workshop for the construction of carriages for nobility.- The Diatto “Manifattura di...

 alongside Alfieri Maserati

Alfieri Maserati

Alfieri Maserati was an Italian automotive engineer, known for establishing and leading the Maserati racing car manufacturer with the other Maserati Brothers....

, he won the Circuito del Garda

Circuito del Garda

Circuito del Gardais an Italian racing venue in Salò on the banks of Lake Garda,known for hosting fifteen Grand Prix races between1921 and 1966.These were arranged in three periods....

 race three years in a row,
the 1922 Grand Prix season

1922 Grand Prix season

The 1922 Grand Prix season saw the French Grand Prix being held in Strasbourg. The Italian Grand Prix moved to its spiritual home at Monza.-Grandes Épreuves:-Other Grands Prix:...

 in a Tipo 20 (twolitre, four cylinder),
1923

1923 Grand Prix season

The 1923 Grand Prix season saw Grand Prix motor racing in Europe. For the first time, the Indianapolis 500 was also designated a Grand Épreuve by the International Sporting Commission of the AIACR. The French Grand Prix was held in Tours. The Italian Grand Prix was held at Monza...

 and
1924

1924 Grand Prix season

The 1924 Grand Prix season again saw Grand Prix motor racing in Europe and North America. The Indianapolis 500 was again designated a Grand Épreuve by the International Sporting Commission of the AIACR, along with the French Grand Prix, held in Lyon and the Italian Grand Prix at Monza. The French...

 in a Tipo 20S. At the VI Coppa Florio

Coppa Florio

Coppa Florio was an Italian car race started in 1900, and renamed in 1905 when Vincenzo Florio offered the initial 50 000 Lira and a cup designed by Polak of Paris. The cup was to be offered the manufacturer that wins four or more of the first seven races, the first race held in 1905...

 1922, he was leading the
Diatto GP305 when it crashed, killing his mechanic Giuseppe Giacchino. The immediate follower, Henry Segrave

Henry Segrave

-External links:* * * * *...

 gave first aid and helped out.
Switching to Maserati

Maserati

Maserati is an Italian luxury car manufacturer established on December 1, 1914, in Bologna. The company's headquarters is now in Modena, and its emblem is a trident. It has been owned by the Italian car giant Fiat S.p.A. since 1993...

, Meregalli failed to finish in the
1926 Italian Grand Prix

1926 Italian Grand Prix

The 1926 Italian Grand Prix was a Grand Prix motor race held at Monza on September 5, 1926.It was the final race of the 1926 AIACR World Manufacturers' Championship season.- Classification :-References:...

, driving a Tipo 26 (1.5 litre, eight cylinder).