Petrol and diesel prices were hiked today by 80 paise a litre each, taking the total increase in rates in the last 12 days to Rs 7.20 per litre. Petrol in Delhi will now cost Rs 102.61 per litre as against Rs 101.81 previously, while diesel rates have gone up from Rs 93.07 per litre to Rs 93.87, according to a price notification of state fuel retailers.