At the end of 1957, alcohol fuels were banned and replaced by a compulsory 130-octane aviation gasoline. This caused problems for Vanwall and BRM with their large bore engines that required methanol for engine cooling. As a result, the Vanwall's power dropped from at 7,500 rpm (308 bhp with nitromethane) to on the test bed. During the race, where revs were reduced, only 255–262 bhp at 7,200–7,400 rpm was available. This put them at a disadvantage to the new Dino Ferrari V6 cars with a claimed 290 PS (286 bhp) at 8,300 rpm. The Vanwall's superior road holding (thanks to suspension changes, new steel wheels, and new nylon-cord Dunlop R5 racing tyres), streamlining, 5-speed gearbox, and disc brakes helped to offset this.