CREATE TABLE table_39733 ("Code" TEXT, "Years" TEXT, "Displacement  ( bore x stroke ) /Type" TEXT, "Power@rpm" TEXT, "torque@rpm" TEXT, "Compression  ( :1 ) " TEXT)

torque@rpm of n m (lb ft)@4050 has what code?
SELECT "Code" FROM table_39733 WHERE "torque@rpm" = 'n·m (lb·ft)@4050'
SELECT "Code" FROM "table_39733" WHERE "torque@rpm" = 'n·m (lb·ft)@4050'