Russian monarchs directly ruled Poland or parts of it from 1772-1914, 142 years (minus 6 to 8 years for the Grand Duchy of Warsaw).
How could we have a similarly lengthy period Russian rule over Hungary at any time between the founding of Kiev and Novgorod and 1900? The whole Hungarian enchilada is not required, occupation of even just a large chunk of it will be a qualifying response. The specific format of Russian rule can be flexible, it can have its own constitution and civil government like the Grand Duchy of Finland or Kingdom of Congress Poland in the 19th century, or it could integrated as just additional Russian guberniyas or oblasts or provinces.