CREATE TABLE table_46528 ("car model" TEXT, "displacement & configuration" TEXT, "max. motive power @ rpm" TEXT, "max. torque @ rpm" TEXT, "max. speed" TEXT, "emissions CO2" TEXT)

What is the displacement & configuration with CO2 of 204 g/km emissions?
SELECT "displacement & configuration" FROM table_46528 WHERE "emissions CO2" = '204 g/km'
SELECT "displacement & configuration" FROM "table_46528" WHERE "emissions CO2" = '204 g/km'