The new Formula One regulations for 2006 required new V8 engines. Toro Rosso was allowed to used Minardi's supply of power limited Cosworth 3 liter V10 engines. This option had been created to assist the less funded teams the expense of building new engines. Formula One allowing Toro Rosso to use this option after the Red Bull takeover caused friction with other teams, in particular Super Aguri and Midland. These teams felt that the engine gave Toro Rosso too much of an advantage. They relived that the concession to allow the team use the V10 engine was based on Minardi's poor financial situation, and should not have apply after the team was purchased by Red Bull.