Here's why UPA-era GDP growth was pulled down in the new calculation

CSO has increased the GDP deflator by nearly 90 basis points in the series, thus bringing down growth at constant prices

A significant part of the downward revision in India's headline economic growth between 2004-05 and 2013-14 can be attributed to the upward revision in the gross domestic product (GDP) deflator (underlying inflation), as economic growth at current prices remains broadly similar at about 15 per cent in both the series.

According to the Central Statistics Office's (CSO's) revised estimates, based on the 2011-12 series, the economy was growing at 15 per cent at current or nominal prices during the 2005-14 period against earlier estimates (2004-05 series) of 14.9 per cent. 

This, however, does not translate into faster growth than estimated