PARIS, France - Red Bull team principal Christian Horner says his drivers need up to nine engines in 2015 following a complicated start for both Daniel Ricciardo and Daniil Kvyat.
Ricciardo's engine blew at the 2015 Bahrain GP, although the Australian driver was able to make it over the line in sixth place. It was the third engine Ricciardo has used in four races.
Teams are only allocated four engines per driver over a season, although they are pushing for a fifth engine. However, given Red Bull's ongoing problems with engine manufacturer Renault, Horner is not optimistic of a rapid improvement within the current rules.