(The Italian engine designation system includes a suffix indicating major components or attributes. The most common were R for
Riduttore - reduction gear and C for
Compressore - compressor/supercharger, followed by a number indicating the rated altitude in hundreds of metres, two speed superchargers were indicated by a double figure such as 10/34). ;Alfa Romeo Jupiter: :The standard Jupiter engine built under licence from the
Bristol Aeroplane Company. ;Alfa 125 R.C.10: rated at ;Alfa 125 R.C.35: 1934 — rated at ;Alfa 126 R.C.10: 1935 — Civilian version of 126 R.C.34 rated at ;Alfa 126 R.C.32: rated at ;Alfa 126 R.C.34: 1935 — rated at ;Alfa 127 R.C.50: rated at ;Alfa 127 R.C.55: 1937 — rated at ;Alfa 128 R.C.18: rated at ;Alfa 128 R.C.21: 1938 — rated at ;Alfa 129 R.C.32: rated at ;Alfa 131 R.C.14/50 :1943 — Two speed supercharger, rated at in low gear and in high gear. ==Applications==