Diesel locomotive were classified as DET 1 and DET 2 (). Due to shortage of petrol products during World War I, they remained unused for regular service in Germany. In 1922, they were sold to Swiss Compagnie du Chemin de fer Régional du Val-de-Travers (), where they were used in regular service up to the electrification of the line in 1944. Afterwards, the company kept them in service as boosters till 1965. Fiat claims a first Italian diesel–electric locomotive built in 1922, but little detail is available. A Fiat-TIBB diesel–locomotive "A", of 440CV, is reported to have entered service on the Ferrovie
Terra Nova 1260HP diesel hydraulic locomotive started to produce the Terra Nova locomotive, its future plans for 2015-2018 being to build a new 2500 HP diesel electric locomotive and a new 6500 kW electric locomotive. The Terra Nova locomotive is a 1260 horsepower machine powered by 2 x Cat C18 Engines of 630 HP each with Cat TR43 Locomotive Transmission packages being able to provide a tractive effort of 230 kN. Built for short-line (20–30 miles) railroad operations or shunting procedures, the Terra Nova is ideal for making line switches and organizing cars within a rail yard. Cat engines and transmissions are worldwide known for their