Bertone had pioneered the wedge concept with the Lamborghini Countach, and they tried a similar approach with the XJS. The Ascot's body is made from hand-beaten aluminium panels and has a hatchback layout.
Its original colour was white, but at some point it was resprayed in gold. The car was fitted with a 5.3 litre V12 engine.
The Ascot's style was borrowed heavily from Bertone's Ferrari-based 308GT Rainbow from the previous year.
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