Is LPG/CNG versions available of Maruti Alto 800 2016-2019 in India?

Not LPG, but yes there are a total 3 CNG variants available; Alto 800 Std CNG, Alto 800 LX CNG and Alto 800 LXi CNG priced at Rs 3.19 lakh, 3.37 lakh and 3.56 lakh respectively. Check out how to switch from petrol to CNG in Alto 800.