The cost to fill a family car now stands at about £103 for petrol, and £106 for diesel, it said.
The war in Ukraine and moves to reduce dependence on Russian oil have helped drive up fuel prices, putting households under pressure as food and energy bills also soar.
The average petrol price is now more than 186.59p per litre, with diesel over 192.48p.
The RAC called on the government to cut fuel taxes to ease the cost burden on motorists, and to help lower the cost of living.
“New records in the average price of petrol have been set every day for the last month, with a litre rising 21p, which has added more than £11 to a tank,” said RAC fuel spokesman Simon Williams.
He said that RAC analysis of wholesale diesel prices indicates that diesel could hit “a previously unthinkable average of £2 a litre”, and that “unfortunately, it has already crossed this threshold at motorway services”.
However, rival motoring organisation the AA said wholesale fuel costs had been steady recently, while pump prices had been rising.
“Another penny on petrol is a surprise given that wholesale costs have been level if not lower since the Jubilee,” said Luke Bosdet, the AA’s spokesman on fuel prices.
He said if petrol continues to go up at the same rate heading into the weekend, “the government has yet another reason to call the retailers out”.
Rishi Sunak has promised to consider another cut to fuel duty amid claims that prices at forecourts are “pump fiction” as they fail to reflect wholesale costs. The chancellor said on Tuesday that he would examine whether to reduce the levy further after cutting it by 5p a litre in March.