CREATE TABLE table_name_98 (weight VARCHAR, power VARCHAR, name VARCHAR)

Which Weight has a Power of kw (hp) at 1,800rpm, and a Name of 9 nc?
SELECT weight FROM table_name_98 WHERE power = "kw (hp) at 1,800rpm" AND name = "9 nc"
SELECT "weight" FROM "table_name_98" WHERE "9 nc" = "name" AND "kw (hp) at 1,800rpm" = "power"