The car made its high-profile public debut on 26 September 1957 at a press presentation staged in Monaco. The ACMA directors ensured a good attendance from members of the press by also inviting three celebrity racing drivers to the Vespa 400 launch •

On the early cars the main door windows did not open which attracted criticism, but increased the usable width for the driver and passenger •

84 kmh
360 kg

Production stopped in 1961 after a total of about 20000 vespa's were made