Unfortunately I can't get past the subscription banner but what I can see of the picture that is not a Sweeney car that I recognise. Mind you such claims for mk1 Granadas and Consuls were rife at that time.
It would be interesting to see what the article actually claims and what real provenance there is to back up the claim but it looks very questionable to me.
I'm going to say this once and once only Gene: Stay out of Camberwick Green!
The principal cars in the show – the Consul 3000 GT in the first three series and the Mk2 Granada 2.8iS for the final season – came care of Ford, whose sense for product placement was second to none in the British motor industry. Dagenham also provided back-up cars such as a handsome, top-of-the-line 1977 Ghia finished in Copper Bronze, which featured in Sweeney 2 and starred in the Messenger of the Gods episode.
The cars all bore false number plates for filming and so, when the Ford collector Mark Marsdon bought a Mk1 Ghia in August 2009, he was initially unaware of its past as an all-purpose Sweeney back-up vehicle until a chance meeting with Pete Maskell, a Granada expert.
I did wonder if the implication was that the car in the picture was that it had been re-registered.
Who knows, may be all a load of nonsense.
“I thought my mother was a bad cook but at least her gravy used to move about".