Yes, TATA Ace comes in CNG model with name Tata Ace CNG. It is powered by Tata 275 IDI NA Engine with 21 horsepower.
Top speed of TATA ACE is 125 KMPH and a mileage of 17.9 km pl with 38 litres tank capacity.
For availability and dealer to buy, you can use this dealer locator option in their website. go through the link below.