Horner implied that he is more up to speed with what is happening at the new Red Bull Powertrains division, which he officially oversees and which is on the same site as the RBR race team in Milton Keynes.
He made the comments in the context of his warning that the 2026 regulations need to be changed to avoid the need for “Frankenstein” cars, and that the current balance between combustion engine and electrical power should be reviewed.
In response, Wolff has suggested that Horner is “frightened” because Red Bull is behind in its 2026 development programme.
Horner in turn has said that he believes the opposite is the case, and that RBP has discovered the potential limitations of the new rules first because it is ahead of some rivals.
“I'm not sure how close Toto is to his engine business, because he's a customer, he’s not involved in HPP's business formally,” he said.
“The feedback that I'm getting from the business, and as you start to see the programme really coming to life and as the simulations firm up are some of the limitations. Which are inevitable.
“I would say it's perhaps as a result of us maybe being well advanced that we're actually seeing some of the limitations.
Source: Autosport