Petrol price has been hiked by about 35 paise per litre in line with firming raw material cost. Petrol will cost 67 rupees 56 paise per litre in Delhi with effect from midnight last night. Prices vary from city to city due to differential local sales tax or VAT rates.This is the first revision in rates of petrol, which was deregulated by the government, since November. Petrol price was cut twice in October and November -first by 56 paise and then by 95 paise per litre.