I'm unaware of any "extremely significant" contribution from Red Bull to Honda PU that was a "game changer" to the point of crediting almost all of the PU's success to Red Bull, as the OP claims.Leon Kennedy wrote: ↑23 Feb 2026, 02:28
I understood what he meant and he is right in saying that the last 3 championships won by Verstappen are not only thanks to Honda. Let's be clear: from 2021 to 2022 the Power unit was developed by Redbull powertrain together with Honda, so from 2022 onwards it was a modified Honda engine. At Sakura they knew the modifications and so they simply helped in the logistics and production part, they have the intellectual property of that engine (in fact it bore the Honda name), but the development it wasn't done only in Sakura.
Honda's withdrawal announcement was made on October 2, 2020.
Basically from 2018 to 2020 pure Honda engine, from the beginning of the 2021 to 2025 Honda modified by Redbull Powertrain.
But one thing is certain: Honda PU was already showing competitiveness, realiability and good performance before Red Bull became directly involved in its development.
