Horner: Toto always thinks he knows what's going on...

Horner took umbrage at Wolff's conclusions that red Bull's new powertrains department was a way to lure Porsche or Audi into Formula 1.

On day one of the 2021 Portuguese Grand Prix weekend, speaking to Sky F1, Horner hit out: "Toto always thinks he knows what's going on in other people's businesses, perhaps he needs to think about his own!"

However, the potential of a collaboration between the energy drinks organisation and one of the two Volkswagen flagship brands may well come to pass.

Horner did not deny it: "We're building a fantastic facility, we've got some great talent coming in. It's going to be on campus, it's going to be integrated fully with the chassis side of the business.

"We wll be the only team other than Ferrari to have that and what the engine is called is another matter.

"At the moment, there are no discussions in place. It's focused on being a Red Bull engine, but of course, that engine could be called anything in the future. But to have that integrated fully into Milton Keynes is tremendously exciting," added Horner.

Also speaking to Sky F1 earlier, Wolff had deduced: "We can see what their strategy is and it is not stupid. on one side Red Bull are keen on doing their own power unit but it is no secret that the Volkswagen group, with their two brands, is looking at Formula 1 and has been part of the discussion.

"They can decide at any moment whether they want to stick to their own power unit or go with a top manufacturer. On the other side, the IP arrangement with Honda really makes sense.

"They are taking over the IP from Honda and developing a new power unit into 2025. It could stay within Red Bull power units or it could go to Porsche or Audi.

"Overall, it makes sense what they are doing. It is just logical that they are going to look at that relationship with Red Bull and utilise the Honda IP.

"Therefore, the Volkswagen group would enter, I say 'would' because in the end it shouldn't be my business, and they will benefit from all of these relationships and intellectual property going forward," added Wolff.