What is the engine name that has a maximum torque at rpm of n·m ( lbf·ft ) @ 3,800?
CREATE TABLE "engine_specifications" (
  "engine_name" text,
  "engine_code_s" text,
  "valvetrain" text,
  "displacement" text,
  "max_power_at_rpm" text,
  "max_torque_at_rpm" text
);
SELECT "engine_name" FROM "engine_specifications" WHERE "max_torque_at_rpm"='n·m ( lbf·ft ) @ 3,800';