CREATE TABLE table_31601 ("Name" CLOB, "Cyl." CLOB, "Bore" CLOB, "Capacity" CLOB, "Power" CLOB, "Weight" CLOB)

What bore goes with an 18 AB?
SELECT "Bore" FROM table_31601 WHERE "Name" = '18 ab'
SELECT "Bore" FROM "table_31601" WHERE "Name" = '18 ab'