Toro Rosso will launch their new STR4 Formula One car at a test in Barcelona on Monday, the race-winning team said on Wednesday.

Frenchman Sebastien Bourdais [Images] and Swiss newcomer Sebastien Buemi [Images] will be the drivers this year, with the latter likely to be the only rookie on the starting grid when the season starts in Australia [Images] on March 29.

Ferrari-powered Toro Rosso, who started last season with the previous year's car, won the 2008 Italian Grand Prix with 21-year-old German Sebastian Vettel [Images] who has since left for sister team Red Bull.

Apart from the former Honda team, whose future has yet to be confirmed after the Japanese manufacturer's decision to pull out of the sport, Toro Rosso will be the last to unveil their new-look car.

The car is based on the RB5 one used by Red Bull and has already had a brief shakedown test at the Adria circuit in Italy [Images].

Honda could also be testing at the Circuit de Catalunya on Monday, although a management buyout led by team principal Ross Brawn has still to be confirmed.

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