Red Bull Racing's RB21 has arguably been the most complicated car Max Verstappen's had to deal with in recent times. It can win races, but only when the car's track specific set-up can be put in its very narrow operating window. Do the Austrians understand their car now? Chief, Christian Horner answers. Red Bull has endured a rather inconsistent 2025 with several podium finishes, including a win in Japan separated by inconsistent performances in China and Bahrain, highlighting Red Bull's struggles to understand their 2025
F1 car. So, have Red Bull finally come to terms with the RB21?
"That is the million-dollar question that I don't think anybody really has the answer to," Horner says in the Inside Track Podcast.
"I think that we're starting to get a much better understanding of RB21 and where we need to improve. We're working hard on that. The whole team is very focused on that."
Red Bull's engineering team works its magic on 'diva car'
Red Bull Racing has often been lauded by experts in their ability to turn a weekend around, and making the car build up a competitive progressiong across a race weekend. Horner is also very much aware of his team's particular strength.
"I think [for] the engineering team [it] has been a head-scratcher and they've done a great job in perfecting set-ups over the weekend and really making progress. But it's been a lot bigger changes than we've historically been used to over the last few years to get to that point."
The Briton also sees the challenges the current car poses for Red Bull, but is confident the team can turn improve across the season.
"So the car has been a little bit of a diva so far this season, but hopefully, as we're getting to know each other better and updates start to subtly appear on the car over the coming races, we'll be able to have a more predictable car and better balance."
However, for Miami, the team boss does not have the best of forecast for the Austrian formation. "Miami is going to be another hot race, theoretically should favour the McLarens. And then we come back to Europe. So, let's see."