There were four different versions of this aircraft each varying in power plant installation. What is described above is the C.101, in addition there was the C103 with a Lorraine 12Dp 450 h.p. water cooled V12 giving a maximum speed of 135 mph, the C.104 with a 9 cylinder 420 h.p. Gnome Rhone Jupiter 9Ab giving a maximum speed of 132 mph and the C.107 powered by 500 h.p. Salmson 18 CMb water cooled 18 cylinder radial engine giving a maximum speed of 139 mph. What is not clear is if these were all separate models or whether some were conversions.