Jaime Alguersuari was a frustrated man after the British Grand Prix in spite of climbing eight places to claim 10th spot at Silverstone.
The Spaniard who, along with Nick Heidfeld, recorded the biggest improvements on their qualifying positions, was left to rue the lack of straight line speed of his Scuderia Toro Rosso STR6-01 which he believes cost him an even better finishing spot.
"I think the race pace was good but in a straight line we were really, really slow," Alguersuari told Autoblog.
"We had no chance to overtake Heidfeld or even Schumacher and we were much, much faster than them on the corners.
"I'm happy for the team because to get some points in every race is important. The strategy went well, the mechanics did a fantastic job but balance is our weakness at the moment - and also in qualifying. We need to work on that.
"The speed we had today in a straight line was not normal."
Alguersuari admitted the changeable conditions at Silverstone made life tough and he had to battle in the early stages when it was raining just to keep his car pointing in the right direction.
"It was difficult, especially at the beginning just to stay on the track. We had to deal with the tyres and just to keep the thing together but it worked out for me. Getting back into the points from 18th on the grid was a good result after we failed to make the most of the soft tyre in qualifying."
Team boss Franz Tost was pleased with Alguersuari's performance, particularly after Sebastien Buemi was forced to retire following a collision with Force India driver, Paul di Resta, that shredded a tyre.
"It was another good performance from Jaime," Tost said. "He had a fantastic race."