CREATE TABLE table_203_525 (id DECIMAL, "car" TEXT, "engine" TEXT, "compression" TEXT, "power" TEXT, "torque" TEXT, "turbo" TEXT, "stock boost" TEXT, "turbine" TEXT, "compressor" TEXT)

how many models used the redtop engine ?
SELECT COUNT(*) FROM table_203_525 WHERE "engine" = 'redtop'
SELECT COUNT(*) FROM "table_203_525" WHERE "engine" = 'redtop'