Different and conflicting opinions have been expressed about the political relations between Agha Mohammad Khan and Zaman Shah. According to contemporary Afghan scholars, Zaman Shah was assumed to be an independent king with a realm beyond its realm. Thus, they have provided a specific interpretation of some of his political actions such as sending an ambassador to Tehran and corresponding with Agha Mohammad Khan. In contrast, a significant number of Iranian scholars consider Zaman Shah to be merely a local ruler that has attempted to separate parts of Iranian territory. The main purpose of this study is to critically evaluate these narratives and reach a new interpretation of these relationships. In this perspective, the narration of the Qajar and Durrani sources on the issue of Khorasan, the borders of the two sides on the side of Khorasan, and the exchange of ambassadors are examined. One of the main questions is, as a significant number of scholars have stated, is the following: Can the relations between Agha Mohammad Khan and Zaman Shah be evaluated on the basis of the Sultan governor model? In the present study, Durrani and Qajar narratives have been compared simultaneously using a comparative method. Based on such comparative method, we believe that Ahmad Shah, as one of the leaders of Nader Shah's army and his grandson Zaman Shah, like Agha Mohammad Khan, sought to gain power in Iran not separating it from the motherland. It is assumed here that that Zaman Shah did not seek to separate any part from the territory of Iran and the events of the following decades and the British colonial policies should not be related to the Durians retrospectively. As such, in some cases, our interpretation of events is based on subsequent events and not on the events themselves and the persons involved in the event.