The Lancia Ro, Lancia Ro-Ro and Lancia 3Ro were 4x2 heavy trucks built by Italian manufacturer Lancia from the 1930s through the 1940s for military and civilian use. The 2-cylinder diesel Ro was produced from 1933 to 1939, the 3-cylinder diesel Ro-Ro from 1935 to 1939 and the improved 5-cylinder diesel 3Ro from 1938 to 1947.
Ro and 3Ro saw extensive military service during the Second Italo-Ethiopian War and World War II, chiefly as two of the main heavy trucks of the Royal Italian Army.