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

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

Results and standings

Results summary

Championship standings