On February 29, 2004, Allmendinger and RuSPORT entered the Champ Car World Series, with Michel Jourdain Jr. joining Allmendinger.
Red Bull also signed Allmendinger as a member of their family of athletes.
He scored a run of six top-six finishes towards the end of the season and won the Roshfrans Rookie-of-the-Year Award ahead of Justin Wilson.
Wilson joined the team for 2005, with both drivers having been in regular contention for podium finishes.
On February 29, 2004, Allmendinger and RuSPORT entered the Champ Car World Series, with Michel Jourdain Jr. joining Allmendinger. Red Bull also signed Allmendinger as a member of their family of athletes. He scored a run of six top-six finishes towards the end of the season and won the Roshfrans Rookie-of-the-Year Award ahead of Justin Wilson. Wilson joined the team for 2005, with both drivers having been in regular contention for podium finishes.
A. J. Allmendinger