The chassis was designed by Rory Byrne, Ignazio Lunetta, Aldo Costa, Marco Fainello, John Iley and Marco de Luca with Ross Brawn playing a vital role in leading the production of the car as the team's Technical Director and Paolo Martinelli assisted by Giles Simon leading the engine design and operations.

Originally intended to debut in Spain, the F2005 was pressed into service earlier in Bahrain, once it became clear that Renault and McLaren had superior cars and better pace.

[8] Ross Brawn admitted the car had aerodynamic problems and the gearbox was quite bulky compared to previous designs, but refused to blame Aldo Costa for the shortcomings.

[10] As for the Hungarian Grand Prix, Michael Schumacher qualified on pole, almost a second ahead of second placed Juan Pablo Montoya (McLaren-Mercedes) and led the race on a track where the Michelin tyre was expected to hold an advantage over their Japanese rivals.

Michael had a light fuel load, and was eventually beaten by McLaren driver Kimi Räikkönen, who at the end of the day had a better pit stop strategy.