Only one from the list I owned was an SD1 2600.
Engine was a shame - plenty of grunt and rumour was that the engineers could have it pushing out the 155bhp of the V8 but for obvious reasons had to cap it.
Good car for its time compared to Grannies and earlier Carltons* but as predicted mine went to the scrappy after tinworm and a HG failure made it worth more cubed.
*uglee images.app.goo.gl/p4kvVTfZbifVhfnW8
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