Sir, I'm planning to buy Tiago but I'm confused between petrol and diesel variant. Please suggest me which is best. And also I'm worried about the maintenance cost

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@SVP Sir, I’m planning to buy Tiago but I’m confused between petrol and diesel variant. Please suggest me which is best. And also I’m worried about the maintenance cost

Question asked from: http://www.carandbike.com/tata-cars/tiago