There are 8 variants of Maruti Alto 800 available in the market. 2 out of 8 variants have CNG options with the name Maruti Alto 800 CNG LXi and LXi Optional. Alto 800 has a 0.8 litre 12 V F8D engine with 796 cc displacement. The engine generates a maximum power output of 47.3 bhp for petrol and 40.3 bhp for the CNG option. The maximum torque delivered is 69 Nm and 60 Nm at 3500 rpm for petrol and CNG Alto 800 respectively.