Lombardini S.r.l. is an Italian manufacturer of Diesel engines up to 65HP. The company was founded in Reggio Emilia by Mr. Adelmo and Mr. Rainero Lombardini in 1933 under the name of "Lombardini Fabbrica Italiana Motori S.p.A.". Adelmo Lombardini had already been manufacturing combustion engines since 1922 with a company called "Società Anonima Cooperativa Metallurgica" in Novellara.

Along with engines, the company of the two Lombardini brothers manufactured finished products such as pumping sets. After World War II this trend increased with production of agricultural tractors and tillers.