LONDON, England - Daniel Ricciardo tested for Formula 1 champions Red Bull at Silverstone but went quickest in his regular Toro Rosso race car.
Ricciardo, battling 2007 World champion Kimi Raikkonen for the Red Bull seat to be vacated by Mark Webber at the end of the 2013 season, drove for both Red Bull-owned teams on the second day of a young driver test.
The Toro Rosso race driver set the day's fastest time of 1min32.972sec with his current team before lunch.
'PUSHING HARD'
Ricciardo then switched to the Red Bull and set a time of 1min33.187, the third fastest of the day. He was also left red faced when he ran into the gravel after just seven laps and stopped the session.
Ricciardo told reporters: "Just my mistake. I was probably pushing a bit too hard."
Red Bull team principal Christian Horner said that they were "keen to have a look at Daniel as a prospect for 2014."
Carlos Sainz junior, 18-year-old son of the retired World rally champion, was an impressive second fastest for Toro Rosso in 1min33.016 on his first F1 outing. He will test the Red Bull on Friday.
Pastor Maldonado, one of four regular race drivers on the track, tested the new type of Pirelli tyres to be introduced at the 2013 Hungarian GP.
Maldonado said: "The tyres feel quite different but we need to see how we compare against other cars on the track with the same compounds.
"We didn't get performance from the car with them so we need more time in Hungary as we couldn't make any set up changes today."
Susie Wolff, the team's female development driver, will be in the car on July 19 in her first proper F1 test.