Toro Rosso driver Carlos Sainz completed 161 laps on day 3 of the pre-season test at the circuit de Catalunya.
Hamilton and Mercedes have won the last two F1 drivers' and constructors' championships.
Sebastian Vettel set the fastest time on the new ultra soft compound tyres as Nico Rosberg accumulated more mileage.
The first pre-season test of the 2016 F1 season is underway at the Circuit de Catalunya in Barcelona.
Ferrari's SF16-H led the way with a time of 1:24.939, while reigning champion Hamilton completed 156 laps.
McLaren-Honda were the fourth team to unveil their 2016 car following Williams, Ferrari and Mercedes.
Mercedes have released the first images of their 2016 F1 car, christened the W07.
Ferrari are hopeful that the SF16-H can challenge Mercedes throughout the season for the Constructors' and Drivers' titles.
Williams Racing finished third in the Constructors' championship in the last two seasons.
Daniel Ricciardo wasn't entirely optimistic about his team's chances in the new season.
The 24-year-old secured the seat in the Manor car last year through a sponsorship package.
The Red Bull Racing team have unveiled their new livery but will showcase the car during the first test in Barcelona on 22 February.
Sebastian Vettel won four consecutive drivers titles with Red Bull Racing before moving to Ferrari in 2015.
Manager gives brief update on condition of motor driver following serious head injury in 2013
Ferrari are set to launch their 2016 F1 challenger on their official website on 19 February.
Schumacher's spokesperson declines to comment on update from Luca di Montezemolo
Renault launches its new F1 team as a full constructor outside their headquarters in Paris.
The 750 brake horsepower, state-of-the-art speed machine can hit well over 200mph.
The 1957 Ferrari 335 S Sport Scaglietti was once driven by Stirling Moss at the Cuban Grand Prix in 1958.
Webber believes Vettel, Alonso and Hamilton are at a very high level compared to other drivers in F1.
Lewis Hamilton has won back-to-back Drivers' World Championships since joining Mercedes in 2013.
Pirelli are conducting a special wet weather tyre test ahead of the 2016 season.
Thin strip of plastic shaped like aerofoil can be used in fridges to retain cool air.
Channel 4 beat rival interest from ITV to grab rights to broadcast 10 races a season between 2016 and 2018.
Renault's Lotus takeover is not completed and will be done 'in the shortest time frame possible.'
Lewis Hamilton has won the last two championships, with teammate Nico Rosberg finishing second both times..
Hamilton came second in the last three races of the season after dominating the year.
JLR could relocate major parts of its business to Silverstone if the deal were to go through.
Executive director Toto Wolff has hinted at potential driver changes if dynamic does not improve.
Hamilton won his third world title in October with victory in the US Grand Prix.