Petrol price on Monday was hiked by 30 paise a litre and diesel by 35 paise, taking the total increase in rates in the last one week to Rs. 4-4.10 per litre. Petrol in Delhi will now cost Rs. 99.41 per litre as against Rs. 99.11 previously while diesel rates have gone up from Rs. 90.42 per litre to Rs. 90.77, according to a price notification of state fuel retailers.