I'm trying to figure out/get more details on the Merlin 102 and 130 series engines. Both were rated for the same performance specs in the Rolls-Royce Merlin PDF at World War II Aircraft Performance site, and both were given the development designation RM.14SM by Rolls-Royce. Of course, their applications were different (Merlin 102 it seems was used in the XP-51G Mustang and the 130 series were used in the DH Hornet) and for sure the 130 series had a downdraft supercharger intake, while the 102 kept the normal updraft intake. Were there any other notable similarities or differences between the engines? And was there other members of the 100 family that was similar to the 102?