with the Fiat gears replaced by gears made in-house by AAC. The transmission was integral to the engine block. The car had independent Dubonnet suspension with integral shock absorber at front, with a live axle on semi-elliptic leaf springs and hydraulic shock absorbers at the rear. As Mille Miglia regulations required that racing car chassis be based on production models, the AAC 815's chassis was also derived from the Fiat 508 C Balilla. The bodywork was done by Carrozzeria Touring using Itallumag 35, an aluminium/magnesium alloy, and was done in long, flowing forms with integrated wings. The bodywork weighed . The complete car weighed and attained a maximum speed close to . Chassis 020, built for Rangoni, was fully trimmed in leather and had luxuriously detailed exterior trim, including extra chrome and a recessed fuel filler cap. Ascari's car, 021, was more spartan. Touring also developed a design for a proposed convertible version of the 815. Drawings and a scale model were produced but this was not further developed due to the onset of World War II. Performance at 1940 Brescia Grand Prix Two 815s, numbers 020 and 021, were completed and entered in the 1940 Brescia Grand Prix, which ran nine laps of a street circuit. Rangoni and Nardi raced in 020, while Ascari and Giovanni Minozzi raced in 021. Minozzi was Ascari's cousin, who participated in many races during the 1920s and 30s without any major wins. After leading the 1500 cc class in the first lap, Ascari's car developed a broken rocker arm and retired. Rangoni then took the lead, set the lap record for the class, and had a lead of more than half an hour when his engine or rear axle failed after seven laps. After the Second World War Further development and production of the 815 was indefinitely stopped when Italy entered World War II on 10 June 1940. During the war years, the company focused on machine tool production, although Enzo Ferrari continued to plan future racing car production. Car no. 020 was sent to a scrapyard by Lotario Rangoni in 1938, following an accident. Lotario died during the Second World War and his brother, Rolando, inherited the car. Rolando attempted to recover the car from the scrapyard in 1958. After locating the car and confirming its identity with Enzo Ferrari, he returned to collect it only to find it had been crushed