Yes but the GP2 car has been the same since 2005, every 2 or 3 years or so a new car is normally rolled out. You can be sure the GP2 series organisers will want to have a car that is as good if not better than the A1 GP machine, especially when you consider that the GP2 organisers are organising a GP2 winter series. The 2 championships will be in direct competition with one another. Also at the moment the GP2 cars have just over 600bhp, the GP2 site hasnt updated the car specifications but as part of the new package for this year the GP2 cars were given a extra 500rpm over 2005.
IRL has 600-650bhp yes but the manufacturers there will have pushed development on by the 2008 season, as for Champcar, they have a new car coming out for the 2007 season although im not sure if there are any modifcations planned for the engine.
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