The 608 will share the same platform as the latest Citroen C5. Engines will be shared with the C5, too, and Peugeot is keen to make sure its latest model puts the emphasis on fuel efficiency.
The car will be launched with a choice of advanced 2.0 and 2.2-litre four-cylinder HDi diesels, while flagship variants will be available with a 2.7-litre V6 oil-burner. The engines will be mated by either a six-speed manual or automatic transmissions, both of which send power to the front wheels.
Sales will begin in 2009.