The price of petrol rose to a new high of Rs 86.56 a litre (increase by Rs 0.58/litre) in Mumbai on Monday. The last all-time high witnessed by the metropolitan city was Rs 86.06 on September 01. In Delhi, the petrol price touched Rs 79.15 per litre — increase by Rs 0.31/litre. The fuel prices have been on the rise since August 16 following a record deep in rupee against the US dollar. The government, however, hopes that the rally in global rates is temporary and will go downwards anytime soon.