Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_20 (displacement VARCHAR, model VARCHAR, fuel_system VARCHAR, power VARCHAR)

### Question ###
What is the displacement when the fuel system is carburettor, and a power of ps (kw; hp), and also has a model of 2000?

### Accurate SQL ###

SELECT displacement FROM table_name_20 WHERE fuel_system = "carburettor" AND power = "ps (kw; hp)" AND model = "2000"