According to the Romanian Ministry of Foreign Affairs:
Given the conditions selected previously, you need a visa in order to travel to Romania.
However, should you fit into one of the situations below, you are exempt from the Romanian visa requirement, for stays that of no more than 90 days during any 180-day period:
• I hold a residence permit issued by a Schengen member state ;
“An essential precondition for the equivalence of these visas as Romanian national visas is that they be valid, namely that the right of stay and validity period not have been used up.";
Therefore the answer is no, you would not be allowed to enter Romania without a visa.