Some teams are unhappy about restrictions on F1 cars

The majority of teams oppose the new technical regulations for 2021 being proposed by Formula 1, BBC Sport can reveal.

Six of the 10 teams indicated in a questionnaire organized by Ferrari, Mercedes and Red Bull that they do not agree with.

Only Alfa Romeo, McLaren, Renault and Williams preferred the proposed new rules to the existing ones.

And two of those have made changes to the 2021 rules.

The parties will meet on 16 October to discuss the issue further.

There is a deadline of 31 October for the FIA, motorsport's world governing body, or F1 that they will back down.

If a compromise can not be reached, Ferrari has the right to veto the 2021 rules package.

What prompted the questionnaire?

Ferrari, Mercedes, and Red Bull are the latest members of the 2021 rules.

According to senior figures, these are more and more restrictions on design freedom and led to a number of teams expressing concerns.

At the meeting, FIA president Jean Todt said he did not want to impose a set of rules without agreement. The Frenchman asked for their opinions on the various issues and suggestions for alternatives.

2021 rules or stick with the existing regulations. In the case of the new rules, it has been called "design freedom", and "what teams felt about standardization of parts".

Only Alfa Romeo, McLaren and Renault were found to be on the list.

The teams' responses were communicated to the FIA ​​World Council, by Ferrari team principal Mattia Binotto on 4 October.

Alfa Romeo and McLaren were among those to propose changes to the FIA ​​and teams' leading engineers at which they stand.

Sunday's Japanese Grand Prix is ​​live on BBC Radio 5 and the BBC Sport website at 06:10 BST

What are the proposed 2021 rules?

F1, under the leadership of former Mercedes boss Ross Brawn, has been working for more than two years on a new set of technical regulations, with the aim of closing it up and making it easier to overtake.

A budget cap has already been agreed, and has continued to support the top teams;

F1 wants to change the way cars produce aerodynamic downforce