Frank Williams said the FW25 is a completely new race car, shorter than lasy year's.
The Ferrari driver's best time of one minute 16.231 seconds was close to the 2018 Spanish Grand Prix pole time by Lewis Hamilton for Mercedes.
Lewis Hamilton did 94 laps of Barcelona's Circuit de Catalunya on the soft C2 compound in a sunny afternoon session
Daniel Ricciardo showed Red Bull's pace on Wednesday by lapping Barcelona's Formula One circuit faster than anyone since the track was reconfigured in 2007.
The sport's oldest and most successful team are hoping the car, with more red and less white in the livery following the departure of sponsor Santander, will take them to a first championship in a decade.
The Mercedes driver's 55th career win was hard-fought and tense, however, with Ferrari's Vettel seizing the lead at the start and in the hunt all the way to the finish as the tyre strategies played out.
Formula One expects to run a shortened season of 15-18 Grands Prix once racing can resume after the coronavirus pandemic, hopefully during the European summer, chairman and chief executive Chase Carey said on Monday. The original 2020 calendar had a record 22 races but the season has yet to start with the first eight postponed or cancelled and more likely to be called off.
The past week saw a lot of brilliance in sports. It started with Juventus and Barcelona lighting up the Champions League with their inspiring football and, later in the week, Mercedes' Nico Rosberg stoked the F1 circuit in Spain, capping a brilliant win to cut teammate Lewis Hamilton's lead to 20 points. Rediff.com has this, and many more memorable moments snapped right here.
Summary of sports events and persons who made news on Saturday
Mercedes set for proper fight with Ferrari in Melbourne
Formula One is changing its scoring system to award a point to the driver who sets the fastest race lap, starting from this weekend's season-opening Australian Grand Prix in Melbourne.
MotoGP: KTM's Oliveira powers to victory in Barcelona thriller
Formula One leader Valtteri Bottas put his Mercedes on pole position by a massive margin at the Spanish Grand Prix on Saturday with team mate Lewis Hamilton having to settle for second in a front row lockout.
Lewis Hamilton had his first taste on Friday of the Mercedes car that he hopes will make him Britain's first four-times Formula One world champion this season.
Ferrari's Sebastian Vettel was fastest in Formula One's pre-season testing at a chilly Circuit de Catalunya on Tuesday while Mercedes rival Lewis Hamilton took one for the team and "sacrificed" his scheduled stint.
Mercedes brought intrigue to Formula One testing on Thursday with television images showing Lewis Hamilton moving his car's steering wheel forwards and backwards as he drove. The mechanism appeared to alter the alignment of the front wheels, with the six-times world champion pulling the wheel towards him on the straights and pushing it back as he approached corners.
Formula One championship leader Nico Rosberg's hopes of an eighth successive win, and fifth of the season, disappeared on Sunday after a collision with Mercedes team-mate Lewis Hamilton on the opening lap of the Spanish Grand Prix.
Briatore revealed that doctors had found the McLaren driver had no health problems other than the injury sustained in the accident. He claimed that he had seen video of the accident, which was not even that dramatic, insisting that the impact was not so hard.
McLaren unveiled their new Formula One car on Sunday, certain it cannot be any worse than last year's but still unsure when they might get back to winning ways after their longest drought in decades. The former champions have not won a race since 2012 and finished last season, the first of a new partnership with Honda, ninth of the 10 teams with just 27 points compared to 703 for dominant Mercedes. The three years without a win is the team's longest barren stretch since their absence from the top step of the podium in 1994-96. "As we embark on the second year of our renewed McLaren-Honda partnership, all of us remain united in our purpose. That purpose is to develop our team towards our shared ambition: to win," said McLaren boss Ron Dennis. "We'll make no predictions as to when those wins will come," he added. The new MP4-31 car was presented online in a predominantly black livery with some prominent new sponsors in LVMH's sparkling wine brand Chandon and watchmaker Richard Mille replacing the departed Tag Heuer.
Yamaha's Jorge Lorenzo trimmed the gap to championship leader Dani Pedrosa at the top of the MotoGP standings to seven points when he stormed to victory at a sweltering Catalunya Grand Prix on Sunday.
Embattled Force India co-owner Vijay Mallya will not be attending Sunday's Spanish Grand Prix but he is hoping for a change of fortune on the track at least for his Formula One team in Barcelona.
Lewis Hamilton's Mercedes suffered a rare mechanical failure on Friday as Formula One teams wrapped up pre-season testing in Barcelona with Ferrari back on top of the timesheets.
Fernando Alonso believes his McLaren team could have the best chassis in Formula One before long this year but the Spaniard also sees no end to champions Mercedes' domination after pounding out the laps in testing.
Reigning champion Chris Froome wasted no time flexing his muscles at the Tour de France as he powered to sixth place in a treacherous opening time trial won superbly by Team Sky colleague Geraint Thomas on Saturday.
One winning streak ended with a bang for Nico Rosberg in Spain but Monaco's tight, metal-fenced streets could see the continuation of another remarkable run for the Formula One championship leader on Sunday.
Italian teenager Francesco Bagnaia made history at the Dutch Grand Prix in Assen on Sunday, fighting every inch of the way to claim not only his first Grand Prix win, not only the first win for the Mahindra Moto3 team, but the first ever in the history of the sport for an Indian constructor.
A summary of sports events and sports persons, who made news on Wednesday
McLaren Formula One driver Fernando Alonso will miss this week's final pre-season test in Barcelona after leaving hospital on Wednesday following a big crash three days ago.
Triple world champion Lewis Hamilton has warned that Formula One's new cars, while better looking and thrilling to drive, may not do much for the racing when the season starts in Australia on March 26.
Nico Rosberg beat Mercedes team mate Lewis Hamilton for the first time this season and cut the Formula One world champion's lead to 20 points with a commanding victory in the Spanish Grand Prix on Sunday.
Triple Formula One champion Lewis Hamilton expressed 'pure respect' for Mercedes team mate Nico Rosberg on Wednesday after the pair cleared the air following their Spanish Grand Prix collision.
World champion Nico Rosberg's retirement announcement on Friday came as a complete surprise even to the man who knows most of Formula One's best-kept secrets, commercial supremo Bernie Ecclestone.
Triple world champion Lewis Hamilton and team mate Nico Rosberg will be given more freedom to race each other this season, Mercedes motorsport head Toto Wolff said on Friday.
Reigning World Champion Lewis Hamilton has lashed out at the plans of new qualifying format in the Formula One, saying the drivers should be consulted before changing the rules.
Ferrari were top in three of the four days in Jerez and second fastest on both days in Barcelona.
The British Grand Prix is set for a record 150,000-strong crowd in July with home hero Lewis Hamilton an even bigger draw after recent setbacks, Silverstone circuit managing director Patrick Allen said on Thursday.
The gap between Mercedes and the rest has narrowed and Ferrari "have something up their sleeve" at this week's season-opening Australian Grand Prix, according to champion Lewis Hamilton.
The German, winner of the season's first two races, had been second before coming in for a fresh set of tyres while Hamilton won with one stop from pole position.
A new qualifying format will shake up the Formula One starting grids this season, adding to the stress on teams and drivers and making races more exciting.
Lewis Hamilton will have a chance to equal his childhood hero Ayrton Senna's tally of three world titles. It is a goal that has the Englishman giddy with excitement.