CREATE TABLE table_21021796_1 (displacement VARCHAR, torque VARCHAR)

What is the displacement for torque of n m (lb ft) @1500 rpm?
SELECT displacement FROM table_21021796_1 WHERE torque = "N·m (lb·ft) @1500 rpm"
SELECT "displacement" FROM "table_21021796_1" WHERE "N·m (lb·ft) @1500 rpm" = "torque"