I haven't thought this through but the difference between a Civl War and a Revolution seems to bs that in the case of Civil War the conflict is a struggle between existing elites or competing interests from within a system that remains broadly in place in the aftermath. In the case of Revolution the conflict is instigated as a means of over-throwing the existing system and replacing it with a different one. The 1640s were I think therefore more Civil War or Military Coup than Revolution.