World Champion Lewis Hamilton continued to set the pace during practice for the Hungarian Grand Prix as Red Bull emerged as Mercedes’ primary challenger.
Hamilton, who topped the opening session on Friday morning, posted a time of 1:23.949 to end the day 0.351s quicker than Daniil Kvyat, with Daniel Ricciardo in third position.
Red Bull’s day, however, was bittersweet as while its RB11 performed well due to the Hungaroring’s layout, Ricciardo stopped on track with 20 minutes remaining when his car suffered an engine failure.
The session was halted briefly as marshals recovered his stranded Red Bull, which came to a halt on the approach to Turn 11.
Nico Rosberg was fourth fastest – 0.7s down on Hamilton – while Ferrari was fifth and seventh, with Kimi Räikkönen ahead of Sebastian Vettel, who two spins during the session.
The pair were split by Carlos Sainz Jr., who continued Toro Rosso’s impressive form by placing sixth, though Max Verstappen was restricted to 11th after suspected electrical issues, albeit only 0.3s behind his team-mate.
Fernando Alonso was eighth fastest in an encouraging session for McLaren, ahead of Williams duo Valtteri Bottas and Felipe Massa.
Jenson Button placed 12th, ahead of Pastor Maldonado, Felipe Nasr, Romain Grosjean – the Frenchman suffering a spin at Turn 13 – and Marcus Ericsson.
Roberto Merhi returned to his Manor Marussia seat after missing the first session in favour of Fabio Leimer and beat Will Stevens to 17th place by just 0.002s.
Force India opted not to run in the session as the squad continues to investigate the specific cause which led to Sergio Pérez’s airborne crash earlier on Friday.