2005–06 A1 Grand Prix season

The 2005–06 A1 Grand Prix season was the inaugural season for the A1 Grand Prix series. It began on 25 September 2005, and finished on 2 April 2006 after eleven races.

Calendar
The first A1 Grand Prix season consisted of 11 rounds, all held in different countries. Each event ran over a three-day weekend, including a practice session on each of Friday and Saturday before a qualifying session on Saturday and two races on Sunday.

Calendar changes

 * A race was scheduled to be held in Brazil at the Autódromo Internacional de Curitiba over the weekend of 10–12 February 2006, but was later cancelled.
 * The Indonesian round had originally been scheduled to be held over 13–15 January 2006, but was postponed due to the death of Sheikh Maktoum bin Rashid Al Maktoum. The replacement date was set as 10–12 February 2006.

Entry list
25 teams, each representing a different country, signed up for the first A1 Grand Prix season. All teams used a control chassis (Lola A1GP), engine (Zytek) and tyre (Cooper Avon). The following teams competed in the 2005–06 championship:

Mid-season changes

 * Enrico Toccacelo replaced Adam Khan at A1 Team Pakistan in Durban after the latter was injured in a practice session. As Toccacelo is not Pakistani, he was ineligible to score points for the team.
 * A1 Team Indonesia was unable to participate in Australia as the team did not find a replacement driver for Ananda Mikola.