Coulthard rues lack of development

David Coulthard believes Red Bull's slow development rate is the reason for their struggles in today's qualifying for the Italian Grand Prix

"I think we're all disappointed with our rate of development, and we're firmly at the back of the main group of cars on this type of circuit," said Coulthard after a disappointing qualifying, in which he finished in 14th position.

"Efficiency is very important here, which involves how closed you can keep the car to cool it, whilst making the car as slippery as possible on the straights and generating as much downforce as possible in the corners.

"Unfortunately, this type of track tends to highlight some deficiencies of our overall package," added the Scot.

Coulthard outqualified his teammate Christian Klien, who spun with just 30 seconds of the second session remaining and had to settle for 16th position.

"I'm disappointed with that qualifying session," said Klien. "I hit the second kerb in the chicane a little too hard and lost the car when I was coming down from the kerb, I spun off and the engine stopped. We'll have to check the data to see why it stopped.

"It's frustrating, as we could have got a little higher than 16th I think. It's going to be a long race tomorrow and very challenging from this position."