if u want to keep the car on petrol and say no to CNG then go for liana brand new,...
reason is in front of you man....its brand new while civic is 4 years ago....brother u have driven liana already so stick to it ....secondly see the things liana are offering...a touch screen dvd player costing itself around 25k...and 15 alloys in nice shape.....with bridgestone tyres....ABS....
liana eminent is value for money bro....get ur hands on it...