CREATE TABLE table_name_4 (used VARCHAR2, power__hp_ VARCHAR2, engine VARCHAR2)

When was power (hp) less than 93 for the OM324 engine used?
SELECT used FROM table_name_4 WHERE power__hp_ < 93 AND engine = "om324"
SELECT "used" FROM "table_name_4" WHERE "engine" = "om324" AND "power__hp_" < 93