CREATE TABLE table_name_90 (capacity VARCHAR, torque__nm__rpm VARCHAR)

Name the capacity for the torque of n m (lb ft) @4150
SELECT capacity FROM table_name_90 WHERE torque__nm__rpm = "n·m (lb·ft) @4150"
SELECT "capacity" FROM "table_name_90" WHERE "n·m (lb·ft) @4150" = "torque__nm__rpm"