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_90 (max_power_at_rpm VARCHAR, displacement VARCHAR, engine_name VARCHAR)

### Question ###
What is the maximum power at rpm for the engine named 2.0 TDI that has a 1968cc displacement?

### Accurate SQL ###

SELECT max_power_at_rpm FROM table_name_90 WHERE displacement = "1968cc" AND engine_name = "2.0 tdi"