Wolff made the remarks after it was recently announced that Red Bull had poached a senior Mercedes engineer for their newly formed powertrains division, which was created in the wake of Honda announcing its exit from Formula 1.
Reacting to Wolff’s comments, which were made after Free Practice One (FP1) at Portimao for this weekend’ Portuguese Grand Prix, Horner said:
“Toto always thinks he knows what’s going on with others. Maybe he should mind his own business.
“We’re building a fantastic facility, and have attracted some great talent.
“It’s all happening on campus, and the project is fully integrated with chassis development.”
He added that “outside of Ferrari, we are the only team that has that.”
Continuing, Horner admitted that their power unit could be branded in the name of a car-maker in the future, but he denied any such talks having already started.
“The name of the engine is another matter. At the moment there are no talks going on about that and the focus is on the Red Bull engine.
“But in the future it could be anything,” Horner added.