CREATE TABLE table_63378 ("Model" TEXT, "Years" TEXT, "Engine code" TEXT, "Power" TEXT, "Torque" TEXT)

What is the torque when engine code is N46B20 and power is ps (kw; hp)@6400?
SELECT "Torque" FROM table_63378 WHERE "Engine code" = 'n46b20' AND "Power" = 'ps (kw; hp)@6400'
SELECT "Torque" FROM "table_63378" WHERE "Engine code" = 'n46b20' AND "Power" = 'ps (kw; hp)@6400'