for the Italian Grand Prix, Warwick and Patrese were the 3rd and 4th fastest cars through the speed trap on Monza's long front straight (behind the similarly BMW powered Benettons of Gerhard Berger and Teo Fabi). Warwick's top speed of , only slower than Berger, again showed that while the car suffered from sluggish acceleration, the lowline concept worked as it created downforce but did not increase drag and hinder top speed. Aftermath Murray has since summarised the reasons for the car's failure: "...I was much too ambitious in how much we lowered it. The rather tall BMW [engine] had to lie down so far it produced a heavily offset crank needing a special gearbox and drivetrain, and what I did wrong was to try to do it in the time available. Secondly, the engine never worked properly in the lay down position. The exhaust and turbo system was a nightmare and it had incurable oil surge and drain problems in corners. One way it was OK, but not the other. The weight distribution gave dynamic centre of gravity movements that messed up the traction. And then Bernie [Ecclestone, owner of the team] who is totally non-technical and had always left that side completely to me, started to get involved on the technical side. We had had 16 years with never a cross word until then, and things were changing with his deeper and deeper involvement in [the Formula One Constructors Association]. Then McLaren made approaches to me and I just felt it was the end of the road at Brabham." Murray also stated in an interview towards the end of the 1986 season that despite the BT55's record, he still believed in the lowline concept pointing out that the cars problems were engine related. He said that the car would have worked better had the BMW been a more compact V6 rather than a straight-4. Murray left the team at the end of the year to join rivals McLaren where he replaced John Barnard as the team's Technical Director and oversaw quality control at McLaren's factory in Woking. As part of a team headed by Steve Nichols, he played a very small part in the design of the very successful McLaren MP4/4 used in . The MP4/4 is usually said to have been based on the BT55 concept, although McLaren team manager Jo Ramírez has downplayed Murray's involvement in