CREATE TABLE table_name_18 (displacement_ VARCHAR, _configuration VARCHAR, emissions_co2 VARCHAR)

What is the displacement & configuration with CO2 of 204 g/km emissions?
SELECT displacement_ & _configuration FROM table_name_18 WHERE emissions_co2 = "204 g/km"
SELECT "displacement_" & "_configuration" FROM "table_name_18" WHERE "204 g/km" = "emissions_co2"