What is the maximum power at rpm for the engine named 2.0 TDI that has a 1968cc displacement?
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 "max_power_at_rpm" FROM "engine_specifications" WHERE "displacement"='1968cc' AND "engine_name"='2.0 tdi';