Toro Rosso has been earmarked as a potential surprise package of the 2011 season.
The Swiss newspaper Blick has christened the Ferrari-powered STR6 the "Wunder Auto" (wonder car) after a strong showing so far in testing.
Faenza based "Toro Rosso looks reasonably strong in terms of consistency," agreed McLaren's Jenson Button, according to The Sun.
On Saturday at the Circuit de Catalunya, Jaime Alguersuari was just two tenths shy of knocking Sebastian Vettel from the top of the times.
The young Spaniard played down suggestions it was a 'show lap' for Red Bull's second team.
"I know very well the conditions under which I did my fastest lap," he said. "Believe me ... I am more than satisfied."