Iam going to buy i20 asta diesel, what are the merits and demerits of the car? and how is the performance including mileage?

@SVP Iam going to buy i20 asta diesel, what are the merits and demerits of the car? and how is the performance including mileage?

Question asked from: http://www.carandbike.com/hyundai-cars/elite-i20/14-asta-diesel