2005 GP2 Series season

The 2005 GP2 Series season started in Imola, Italy on 23 April, and ended in Manama, Bahrain on 30 September. The season was won by the German Nico Rosberg, with the Finn Heikki Kovalainen finishing second.

2005 was the first season of the newly renamed Formula One feeder series, from Formula 3000 to GP2. The inaugural season did not feature reigning F3000 champion Vitantonio Liuzzi, because the Italian was driving for Red Bull Racing in Formula One. The series did feature two former F1 drivers, Italians Gianmaria Bruni and Giorgio Pantano, driving for Coloni and SuperNova respectively.

In the opening race at Imola, there were a number of mechanical problems and organizers being afraid of trouble at the start, so the rolling start was used in both races, though weather was dry. Nicolas Lapierre had taken his inaugural pole position but he was out before the race had started due to mechanical problems. The race was won by his team-mate Heikki Kovalainen.

After the first weekend, it was decided that the points for the fastest lap would only be awarded if the driver was classified. This was due to the event in the Imola sprint race, where Lapierre started with a fuel load with which he wouldn't have been able to finish, set a fastest lap and retired soon after.

At Barcelona, the drivers could finally experience rolling starts. F1 refugee Bruni won the feature race and José María López the sprint race. The first four races had been won by four drivers in four teams, highlighting that the field had many competitive drivers. Adam Carroll was the first driver to take a second victory after he won at Monaco, where only one race was held.

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