Cars Q&A

I HAVE DECIDED TO BY A SEDAN CAR PLEASE SUGGEST ME WHETHER TO BUY A FIAT LINEA T-JET, HONDA CITY OR WALKSWAGEN VENTO I PREFER PETROL ENGINE. PLEASE ALSO SUGGEST ME WHETHER AFTER MY PURCHASING THE PETROL VERSION OF ANY OF THE ABOVE PRODUCTS WHICH CAR WOULD GO WELL WITH CNG KIT TO BE FIXED EXTRA BY A LOCAL PROVIDER. WOULD ALL THE MODELS GO WELL WITH CNG KIT. PLEASE SUGGEST ME URGENTLY AS I AM PLANNIG TO BUY A CAR IN NEAR FUTURE. ALSO ANY LINEA OLD AS WELL AS NEW LINEA T-JET USER MAY HELP ME OUT IF POSSIBLE.