Subaru has revealed details of its diesel Forester and Impreza ahead of the cars’ show debut at Paris in October.Both models will use the same horizontally opposed 2.0-litre boxer diesel engine, which provides 258lb ft of torque from 1800rpm. The Subaru Impreza diesel gets 148bhp and the Forester SUV gets 3bhp less due to the airflow available through the grille.Autocar has already experienced the new diesel engine in the Subaru Legacy, and found it be one of the best four-cylinder diesels on the market. But the new Impreza and Forester will up the game again by introducing a new six-speed manual gearbox. We won’t have to wait long to get behind the wheel of the diesel Forester, which goes on sale at the end of the month. The Subaru Impreza 2.0d hits the showrooms in January 2009.