Opel officially announced the introduction of a new diesel engine for the Insignia sedan. We talk about a 1.6-liter CDTI unit which takes the place of a larger 2.0-liter engine. Average fuel economy figures are rated at 3,9 liters/100 km or 61,8 mpg US. The engine delivers 120 horsepower for a 0-100 km/h acceleration of