Unveiled at the Milan Motor Show in 1952 in response to the Spring Lasting, it was put into production in 1954. There are now very few examples left of the Leonessa 250. The model featured a 246 cc four-stroke parallel twin with light alloy cylinders and head. The bore x stroke was 53x56 mm, the maximum power output was 15 hp at 7000 rpm, while the maximum speed reached 120 km/h.