I believe that 2006 F1 cars had at least 800 hp, as it was before the 18,000 rpm rev limit was imposed. The best 2005 F1 cars produced 980 hp from their 3 liter V10s, and they were the most powerful F1 cars ever raced. Turbo cars may have qualified with more hp at one point, but they raced with far, far less.