teammate at Ferrari), and former teammate Rosberg who claimed that once it became known they would not be using the Japanese engines the next season, their Honda engines did not seem to work as well as was once normal. Until that point Prost's MP4/5 had not been a match for Senna's on Monza's long straights, which had many, especially those in the press, wondering if there was actually truth to Prost's claim that his Honda engines were not as good as the ones Senna was able to use. Prost actually won the Italian Grand Prix, after Senna's engine blew with only 9 laps remaining. To the delight of the tifosi whose team he signed for the 1990 season, at the rostrum Prost dropped his driver's trophy into the crowd, to the anger of Dennis who since changed McLaren's policy requiring that all trophies won by drivers belong to the team. Dennis was in fact so incensed at Prost that he threw his constructor's trophy at Prost's feet on the rostrum. Prost had a replica trophy made for Dennis but it sat in a cupboard for over 6 years. As 1989 wore on, Prost continually claimed his Honda V10s were not producing the same amount of power as those in Senna's car. It actually got to the point where Honda F1 boss Osamu Goto felt compelled to speak to the specialist British media on the matter. He claimed that Senna's foot-tapping style with the accelerator helped keep the RA109-E's revs up in the engine's mid-range where most of the power was, while Prost's smoother style dropped the engines into low revs where they had a pick-up problem. Apparently the talk was convincing until most of those present noticed Goto continually called them Ayrton and Prost respectively (per Japanese customs, addressing a person by their first name rather than the surname shows a much higher degree of familiarity and confidentiality). Evidence to support Prost's claims was seen during the . His car was running less wing than Senna's which theoretically would give him greater top speed, Prost's McLaren was not able to pass Senna's on the long front straight even though he came off the final Peraltada Curve clearly faster than Senna and also had the benefit of a tow. In stark contrast, late in the race when Senna was lapping Prost (who was on fresh tyres), Senna was easily able to