As per world market India GDP to reach 8% by 2017. Whole credit goes to Oil price fall. Crude price will become a big factor for south Asia growth.
Such developing country wasting lot of money on crude oil import. As Price fall their savings increase and investment on infra will increase. As this investment grow , country GDP will grow.
New India Government also working hard in reducing subsidy or only logical subsidy . This also reduce government spending and money will save for infra , health and education sectors. In coming years government is going to spend lot of money in Infra ,health and education sectors. This will also lead in reduction of fiscal deficit.
All above factors add the GDP.