CREATE TABLE table_15302 ("Driver" CLOB, "Entrant" CLOB, "Chassis" CLOB, "Engine" CLOB, "Tyres" CLOB)

What engine was in the Theodore n183?
SELECT "Engine" FROM table_15302 WHERE "Chassis" = 'theodore n183'
SELECT "Engine" FROM "table_15302" WHERE "Chassis" = 'theodore n183'