LONDON, England (CNN) -- Red Bull Racing drivers David Coulthard and Mark Webber have put a brave face on being outperformed by the team's sister squad, Toro Rosso.
Mark Webber (left) and David Coulthard have found the going tough for Red Bull Racing of late.
Sebastian Vettel became the youngest winner in Formula One history at Monza and his victory came on the back of some impressive displays from Toro Rosso since the summer.
It has left the senior Red Bull outfit scratching their heads at how they have been left in the shade by a team with the same chassis but a much smaller budget.
"I think you have to look at the fact that they have the same car that we have -- they obviously have different drivers and a different engine -- but they have enough people to build that car, they have the facilities to build it and take it to the grands prix," countered Coulthard, who retires at the end of the season.
"If you actually look at it from that point of view you can say that they have been able to get a bit more out of the package over the last few races than we have.
"But the thought that they are a minnow team with not enough money to put tires on the car is just not the reality."
Red Bull Racing is the principal team, with Toro Rosso set-up in 2006 to act as a talent feeder to its older sibling.
That has worked on the driver front -- Vettel moves alongside Webber for 2009 -- but the performance differential between the two has been large enough to cause some discomfort.
"Obviously we would like to be the Red Bull part of the team that's doing the winning, that's obviously the focus as a team," added Coulthard, who has scored points just once this season.
"They've managed to get there before us but I don't think there's any embarrassment on our part. We just have to take that on the chin and realize that there are areas that we've got to improve.
"We just need to get on and make better use of the tools that we have."
Webber had a strong start to the season, scoring points in six of the first eight races, before tailing off.
But two eighth-place finishes in his last two races has given Webber confidence they can challenge strongly for fourth place in the constructors' championship -- starting this weekend in Singapore.
The Australian said: "Toro Rosso are having a good run, so they are our direct competition in the constructors' at the moment, which is not ideal but the scoreboard never lies. Renault and Toyota are a little bit further away.
"But we picked up the odd point here and there in Spa and Monza. We are coming here with confidence and we have got a few little upgrades on the car."