The pomp and circumstance of multi-million rand glitzy launches that used to mark the unveiling of a new Formula 1 car is a thing of the past. Instead, some teams opt for an online release of a few images while others invite a few folk over to their factories for a bit of a show. The rest are happy to reveal their cars in the Jerez pitlane and get straight down to business.

It is ultimately the laptimes and reliability that is most important in the early days before the 2015 season. But let’s take a minute to appreciate that Formula 1 is once again stunningly easy on the eye. In fact, it’s hard to pick the best looking car of the lot. At Red Bull they’ve played around with a rad-looking white-and-black camouflage livery. The new look is only interim however team Principal Christian Horner has promised to debut even stronger colours in Australia. The Ferrari SF15T has long, elegant swooping lines that carry all the way through to an elongated nose and the McLaren’s lustrous silver bodywork has been accented by swathes of red as a nod to new engine supplier Honda.

Nevertheless, the most vital test is how, and if, these cars come alive on the track. The first four-day test session took place at the Jerez de la Frontera circuit in southern Spain.

Day one: Sebastian Vettel sets the fastest time of the day for the Ferrari team with a time of 1:22:690 with a lap total of 59. Fernando Alonso completed the least amount of laps, six, in his McLaren Honda. The MP4-30’s, dubbed the McHonda, problems centred mostly on their new Honda engine. The Lotus team were absent from the pitlane following their announcement that the E23 wasn’t quite ready to run.

It was a remarkable day for Mercedes who clocked 157 with Nico Rosberg. Although Mercedes did have a shakedown at Silverstone to clock 157 laps in a day is an extremely good sign for the defending champions.

Day two: Once again Sebastian Vettel tops the timing sheets with a fastest time of 1:20:984 in his Ferrari. The Lotus team did a terrific job to show up for the second day of testing and managed a total of 41 laps with Pastor Maldonado and a quickest time of 1:25:802. McLaren managed only a couple of installations with Jenson Button before spending the entire morning in the garage with more electronic issues.

The final few hours of the second day of testing were blighted with rain however Lewis Hamilton was still able to complete 91 laps before a water leak brought an end to his afternoon. Sebastian Vettel racked up 89 laps and Sauber’s Felipe Nasr’s 88.

Day three: Brazilian rookie Felipe Nasr set the quickest time of the day ahead of Ferrari’s Kimi Raikkonen. Nasr completes an impressive 108 laps in the blue-and-yellow Sauber but Mercedes’ Nico Rosberg racks up the most laps with 150.

On their second day of testing Lotus is able to complete 91 laps with Maldonado and provide a consistent base for feedback on the E23. McLaren have a better day with Fernando Alonso who is able to complete 32 laps. However, the McHonda would later stop on circuit with a water pressure problem. Rookie Carlos Sainz Jr has a notable day out with the difficult Toro Rosso by completing 136 laps.

Day four: The final day is topped by Kimi Raikkonen ensuring that a Ferrari-engine has topped all four days at Jerez. The 1:20:841 is the fastest of all four days but is kept in cautious perspective by Raikkonen who calls the SF15T “a good starting point.”

Felipe Nasr and Lewis Hamilton complete the top three while Romain Grosjean’s day was brought to an early end with a “power unit issue.” Jenson Button has no easier time of it in the McLaren as engine problems and a fuel pump issue curtail the team’s program.