Showing the difference in horsepower between 1987 and 1988, Senna's pole time of 1:25.974 was 2.514 seconds slower than Nelson Piquet 's 1987 time of 1:23.460. For the most part, qualifying times in 1988 had either matched or actually beaten the times from the previous year showing advances in engine response, aerodynamics, tyres and suspension. However, on a power circuit such as Monza, the loss of some 300 hp (220 kW) was very noticeable.
The third row of the grid was a surprise, even at this power circuit. Ever since the item was made compulsory for turbo powered cars at the start of the 1987 season , the Arrows team had been experiencing problems with the FIA pop-off valve on their Megatron turbo engines, the problem being that the valve was cutting in too early and the drivers weren't able to exploit the full available power. In 1987 this meant that drivers Derek Warwick and Eddie Cheever struggled to keep up with their turboc...