Toro Rosso team principal Franz Tost has admitted the team know very little about their 2014 car, the STR9, because of the limited running it has completed. The Italian outfit, sister-team to Red Bull, has completed just 616 miles during the Jerez and Bahrain test, whilst the Mercedes team has done over 1,909 miles. "It is difficult to assess the performance of the car," he told SpeedWeek. "We hardly know how the car handles, because we have done so few laps. "Both the reliability and performance represent two unknowns." He is however confident Renault is making some progress with the new power unit, but admits they're well behind their rivals. "In addition to...
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