The 2005 Porsche 911 redesigned rear-wheel-drive models. The models are available as coupes and convertible Cabriolets. They all have a rear-mounted, horizontally opposed 6-cyl engine. The redesigned Porsche 911 has subtly altered styling and dimensions and changed the interior. There are two types of 911: The Carrera, with a 325-hp 3.6 liter engine and The Carrera S, with 355-hp 3.8 liter.