In 1922 the Maserati brothers, Alfieri and Ernesto, began to work closely with the Diatto Company after the presentation of the latter’s Tipo 20 car at the Milan Exhibition. By 1925, after some competition success, Diatto decided they wanted to go Grand Prix racing and, as that required an engine of a maximum of two liters capacity, the Maserati brothers developed a suitable unit. After much testing, two cars were taken to Monza in November for the Grand Prix.
Only one of these was to ultimate specification and this was driven by Emilio Materassi. Despite holding positions in the top six and lapping at an average of at least 90 mph, after 250 miles and a long pit stop, the car was out of the race.
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