But where will Red Bull be in three years’ time? They have a contract with F1 until 2020, but no engine deal beyond the end of 2016, when the Renault contract runs out.
Owner Dietrich Mateschitz and motorsport boss Helmut Marko have both said in recent months that they may quit F1 if they do not have a competitive engine, and there is no obvious route to obtaining one of those other than hoping that Renault sort themselves out.
Abiteboul insists no decision has been made on future strategy, but admits that if they can’t solve the engine problems by the end of 2016 – something that may depend on the opening of in-season development again next season – Renault could pull out.
Another option is for Renault to buy their own team and become an entrant again. Horner says that even if they did, Red Bull would be happy to stay with them beyond 2016 – as long as the engine is competitive. “What we really need is for Renault to commit to make the investment, make up their minds, to do it properly or to stop,” he says.
But he adds: “Our problem, and what Dietrich was referring to, is that if Renault pull out, Mercedes and Ferrari won’t supply us an engine, Honda have got their lock-in with McLaren. There are no other options.”
He rules out “categorically” Red Bull building their own engine – “the investment, the infrastructure, the lead time; there is no way” – and says that, despite recent reports “there has been no dialogue with Audi or VW”.
And if it’s 2016 and the engine still isn’t competitive but Renault still want to supply them? “Then,” says Horner, “We have some big choices to make.” Andrew Benson is BBC Sport’s chief F1 writer