CREATE TABLE table_51254 ("Years" TEXT, "Displacement" TEXT, "Engine" TEXT, "Power" TEXT, "Torque" TEXT)

Which engine has a torgue of lb ft (n m)?
SELECT "Engine" FROM table_51254 WHERE "Torque" = 'lb·ft (n·m)'
SELECT "Engine" FROM "table_51254" WHERE "Torque" = 'lb·ft (n·m)'