This paper conducts a comparative analysis of India's economic performance under Prime Ministers Narendra Modi (2014-2019) and Manmohan Singh (2009-2014), examining a diverse set of economic indicators from 2009 to 2019. The study focuses on assessing the reliability of GDP growth figures against real-time economic indicators to uncover discrepancies and provide insights into economic policy effectiveness. Key indicators such as domestic sales of vehicles, retail loans, airline traffic, infrastructure development, tax collections, and inflation rates are analyzed to gauge economic health across both administrations. The findings suggest that while reported GDP growth was higher during Modi's tenure, many real-time indicators performed better under Singh's administration, questioning the accuracy of GDP data post-2015. This research underscores the importance of robust economic data for informed policy-making.