After the price hike, effective from May 1, while the&nbsp;A4&nbsp;(diesel) model will cost&nbsp;Rs&nbsp;33.96&nbsp;lakh&nbsp;as against&nbsp;Rs&nbsp;32.81&nbsp;lakh&nbsp;at present, the&nbsp;A6&nbsp;(diesel) model will be costlier by&nbsp;Rs&nbsp;1.60&nbsp;lakh&nbsp;at&nbsp;Rs&nbsp;44.91&nbsp;lakh.