user: Question: Engine 2.5 20V D has what engine code?
Columns: ['Engine', 'Cyl.', 'Power', 'Torque', 'Engine code', '0–100km/h (sec.)']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2.0 16V', 'I4', 'PS (kW; hp)', 'N·m (lb·ft)', 'M111.942', '9.4 - 10.4']
SQL:

assistant: SELECT "Engine code" FROM "Table" WHERE "Engine" = '2.5 20V D';