The Holden Commodore has been around since 1978, but in three major shapes.
The [link|http://www.carshowcase.org/wallpaper/Holden/VB03.jpg|VB Commodore] (1978-1988) was almost the spitting image of the [link|http://www.soulweb.com/winterfloh/anzeigen/bilder/opel-rekord.jpg|Opel Rekord] of the time. It had the Rekord body, but Australian engine / transmission / suspension.
It was almost unrecognisable four facelifts later when the [link|http://www.rarespares.net.au/rare_spares/gallery/customer_car_images/vl-commodore_tmasters.jpg| VL model] was launched in 1986.
In 1988 the [link|http://www.carshowcase.org/wallpaper/Holden/VN02.jpg|VN model was launched]. Based on an [link|http://auto.nonstop.com.ua/fotos/big/721.jpg|Opel Senator] body, but widened by a few inches. Engine was the GM 3.8 V6 as found in lots of Buicks I believe. Three facelifts later and it ended looking like this - [link|http://www.smasa.com.au/documents/archives/2002/pictures/visitors_cars/daniels_vs_commodore.jpg| the rather nice-looking VS].
Next up, the [link|http://www.carshowcase.org/wallpaper/Holden/VT07.jpg|VT model] which stole the front door panels off another Opel (probably the Senator again) but I think the rest of Australian designed. Two facelifts later, the last of the line is the current model, the [link|http://www.users.on.net/~nweber/commodore/vz/images/vz-acc-05.jpg| VZ].
There we go. Thanks for bearing with me. Should you ever visit Australia, you'll be able to hold your own when the discussion around the BBQ turns to Holdens. As it inevitably does...