OPEL SENATOR

Here's Wikipedia on this car: "It was essentially the top of the range Vauxhall and Opel being a lengthened and highly specified Carlton, Omega or Rekord depending on the year and the market.

The Opel Senator was a large motor car, two generations of which were sold in Europe by the German General Motors subsidiary, Opel, from 1978 until 1994. A saloon, its first incarnation was also available with a fastback coupé body as the Opel Monza and Vauxhall Royale Coupe.

Through the international divisions of General Motors, it was also known in various markets as the Chevrolet Senator, Daewoo Imperial (in South Korea), Vauxhall Royale and Vauxhall Senator. "

I'm sure there was a Holden version too in Australia. I always rather liked them although the Carlton in particular was spoiled in the UK because of the company car legislation of the time which gave you a heavy tax penalty if your company car had an engine bigger than 1800cc. This meant that there were a lot of big, high spec cars like this with inadequate engines.