In Italy, new cars with engine displacement over 2,000 cc were subjected to a 38% value added tax, against 19% on smaller displacement cars. Therefore, throughout the Biturbo' production run, two models were made; the two-litre models aimed mainly at the domestic market and "export" versions, initially with a 2.5 L V6 engine and later, a 2.8 L V6 engine. The carbureted 2.5 L engine was rated at and of torque in North American specification and and of torque in European specification.