On the eve of the first day of pre-season testing, Toro Rosso has revealed its 2017 challenger, the STR12, Daniil Kvyat and Carlos Sainz unveiling the car, featuring a new livery, in the Barcelona pit lane this evening.

"For all Formula 1 fans, 2017 should be a year of excitement and uncertainty," said Team Principal, Franz Tost, "as the sport's technical regulations have undergone one of the biggest changes we have seen in a couple of decades. In simple terms, the cars are wider, longer, lower, faster, noisier and use bigger tyres, promising more grip, higher cornering speeds and hopefully even closer racing.

"Everyone in the team has worked extremely hard to ensure we have a very competitive season. Our chassis is mated to what is possibly the most competitive engine we have had so far in the hybrid era, as we return to Renault power once more.

"Daniil Kvyat will be in his fourth year as a Formula 1 driver and Carlos Sainz will now tackle his third season with us. They are a very talented pairing and they have worked very hard over the winter to be ready for the additional physical challenges involved in driving these new and faster cars.

"The crew that will look after the cars at the track is also very well prepared and generally, throughout the company we have the stability and strength in depth to tackle this season, when the pace of car development will be much faster than over the past couple of years. Finally, we really like the first major livery change of our twelve years on the F1 grid and this new look is reflected in our pit garage, which has also been updated to make life easier while working around these much larger cars."

"With driver continuity and a power unit which made a major step forward last year and which should be developing strongly this year, it just leaves the chassis as an unknown quantity," admitted Technical Directer, James Key. "We always set ourselves ambitious targets and this year, we are taking a more long-term view over the 20 races, with a long list of planned in-season developments. I suspect it will be a very busy year with plenty of performance still to be found."