Welcome to the Android Archaeology department. You are looking to bridge the gap between the "Chocolate Bar" era (KitKat) and the "Lollipop" era. This was one of the most significant transitions in Android history, introducing Material Design and the switch from Dalvik to ART runtime.
If you install a ROM meant for a different model, the device may become unusable. Performance: update android 44 4 to 50 download patched