Petrol and diesel prices were on Monday hiked by 40 paise a litre each, taking the total increase in rates in the last two weeks to Rs 8.40 per litre. Petrol in Delhi will now cost Rs 103.81 per litre as against Rs 103.41 previously, while diesel rates have gone up from Rs 94.67 per litre to Rs 95.07, according to a price notification of state fuel retailers.