Table schema:
CREATE TABLE table_1147705_1 (engine_type VARCHAR, max_torque_at_rpm VARCHAR)

Question: What is the engine type when the max torque at rpm is n·m ( lbf·ft ) @ 4,800 Answers:?
SQL: SELECT engine_type FROM table_1147705_1 WHERE max_torque_at_rpm = "N·m ( lbf·ft ) @ 4,800"