CREATE TABLE table_19704392_1 (rpm VARCHAR, standard_speed__6th_gear_ VARCHAR)

when standard speed (6th gear) is 88, what is the rpm?
SELECT rpm FROM table_19704392_1 WHERE standard_speed__6th_gear_ = "88"
SELECT "rpm" FROM "table_19704392_1" WHERE "88" = "standard_speed__6th_gear_"