Table schema:
CREATE TABLE table_name_42 (engine_name VARCHAR, max_torque_at_rpm VARCHAR)

Question: What is the engine name that has a maximum torque at rpm of n·m ( lbf·ft ) @ 3,800?
SQL: SELECT engine_name FROM table_name_42 WHERE max_torque_at_rpm = "n·m ( lbf·ft ) @ 3,800"