Mercedes boss Toto Wolff says it would be the "beginning of the end" for Formula One if the series adopts Ferrari's suggestion to introduce a method of engine performance convergence from 2022 onwards.
The controversial topic has been put forward by Ferrari as a condition for its agreement to a freeze in engine development from 2022 to 2025.
The freeze is essential for Red Bull, which hopes to buy Honda's engine design and continue to use it when the Japanese manufacturer leaves F1. Red Bull does not have the resources or the factory to continue to develop the engine when Honda leaves, but a freeze in development would allow it to buy the intellectual property and continue to build and use the engines.