The sun has set on pre-season testing for another year, with some teams leaving the Circuit de Barcelona-Catalunya with a bounce in their step while others are scratching their heads for answers. We pick out the winners and losers from six days of running in Spain…

Winners: Mercedes

Ask anyone who spent time trackside or in the F1 paddock during pre-season testing and they will tell you world champions Mercedes look unbelievably good. They completed a monstrous 903 laps over the course of six largely untroubled days – which is the equivalent of 13-and-a-half Spanish Grands Prix distances.

They were the kings of long run pace, heading the field by around 0.6s/lap according to our data, and around a second per lap quicker than anyone when they took the fuel out and ran the softer compound tyres for shorter runs. And they pulled off a scoop when they turned the heads of everyone in F1 with their innovative Dual Axis Steering (DAS) steering system.

DAS explained: What we know so far about Mercedes’ trick new steering system

It wasn’t completely untroubled, with Lewis Hamilton admitting they have “still go a few issues we need to iron out ahead of Melbourne” having lost an afternoon in the car (more on that further down), but that’s what testing is for – to find the problems now, so they can be rectified before things get serious. The Silver Arrows look, once again, like the ones to beat.

Losers: Mercedes engines

But while Mercedes were winners, their engine drops into the loser category. Their power unit is usually bulletproof and has been the class of the hybrid era, but having pushed the bar once more over the winter, a sniff of unreliability has crept in.

Customer Williams appeared to bear the brunt of it in Barcelona, suffering four issues over the course of testing, but the works team were hit, too, with Hamilton missing a whole afternoon of running after an oil pressure anomaly caused the engine to shut down as a precaution.

You suspect they will get on top of it but equally, it’s a rare chink in the armour which their rivals must exploit while they can.

Winners: Red Bull

There’s a quiet confidence at Red Bull that it’s been a job well done at pre-season testing. The test was not without its problems, the team encountering a rear suspension issue on the penultimate day among other niggles, and Max Verstappen had a fair few spins, as he searched for the limit of a car that at times looked a bit of a handful.

WATCH: Skittish car ‘not a worry’ insists Verstappen

In terms of pure performance, their short run pace was better than Ferrari’s – with Verstappen looking very quick on the C4 as he set the second best lap time of the entire test – while their long run was only 0.1s/lap slower than their red rivals.

The team, who brought a sizeable upgrade to week two including new bargeboards, largely focused on running the C2, the second hardest in Pirelli’s range, completing more laps than anybody else on that rubber – 583 of their 780 – and seem to be happy with the baseline of the car heading to Melbourne.

Losers: Ferrari

There were high hopes Ferrari would challenge Mercedes, at last, for the world championship in 2020 – and while they still might, the warning signs from testing, both on and off the track, were not encouraging.

Our data shows they have a significant loss of time on the straights versus last year – they were around half a second slower than Mercedes in Barcelona. They could, of course, be running the engine at lower power before turning it up in Australia.

Equally some of that deficit could be down to their move to add more downforce to the car to improve their slow corner speed. Our data shows they were the quickest through slow corners, which would have been through sector three, with a 0.3s advantage over Mercedes.

Team boss Mattia Binotto insisted they weren’t hiding anything and expects them to be behind Mercedes at the start of the season. If that’s the case, they appear to have failed to meet their targets.

READ MORE: We’re not ‘sandbagging’ in pre-season testing, insist Ferrari

Winners: Racing Point

Some joked in the paddock that Racing Point didn’t need their truckies anymore because Mercedes would be dropping off their car for them. Dubbed the pink Mercedes, as it shares striking similarities to last year’s world championship winning W10, the RP20 has been impressively quick, so much so some have marked it out as the third fastest car.

With 782 laps on the board (only Mercedes, Ferrari and McLaren managed more) it was a job well done for Racing Point, who are finally seeing the rewards of a huge cash injection from billionaire Lance Stroll.

Their short run pace, which put them third overall in the pecking order in our metric, was particularly imposing with Sergio Perez describing the car as the best he’s ever had in pre-season. It’s early days, of course, and they will face a big threat from McLaren and Renault, but right now, it looks like they are topping the midfield heading to Australia.

TECH INSIGHT: Why the new Racing Point RP20 caused a stir at pre-season testing

Losers: Alfa Romeo

Not only did Alfa Romeo barely feature in Netflix’s Drive to Survive Season 2, released on Friday, they were also largely anonymous during pre-season testing. They opened with the launch of their new challenger in the pit lane on the opening morning and held a lengthy press conference at the end of the day where they were bullish about their chances.

On track, they were quickest in the speed trap on the final day but clocked the slowest lap of all the teams, while our data shows they were second bottom in terms of short run pace, 1.8s/lap off Mercedes and 0.5s/lap ahead of AlphaTauri. It’s early days, of course, but both Antonio Giovinazzi and Kimi Raikkonen admitted there is plenty of work to do in the next week or so.

Winners: Williams

Williams were winners from the moment they got their car to the first test on time, having missed the first two days last year. They then had the honour of being the first car out on track, which was symbolic if nothing else.