UPDATE, 19 January 2021: Sources at Rolls-Royce have all but confirmed the company's intention to launch a fully-electric Silent Shadow model.
The Silent Shadow will potentially be offered in both rear- and all-wheel drive, with a driving range tipped at more than 500km.
In November 2020, rival Bentley announced its entire model range would use all-electric powertrains by 2030.
29 September 2020: BMW has filed to trademark the name 'Silent Shadow' in Germany, suggesting that a long-rumoured all-electric Rolls-Royce could be further into development than we previously thought.
The paperwork tells us the designation is for "automobiles and their parts," but does not specify the project for which it is destined.
Regardless, it's hard to imagine the name – which is reminiscent of the 20th century's Silver Shadow – ending up anywhere else.
The German-owned British manufacturer has not released a launch dates or specifications for an electrified platform, however last week vowed to release a zero-emissions car "by the end of the decade."
Rolls-Royce built two generations of the Silver Shadow, between 1965 and 1980.
Above: a 1971 Rolls-Royce Silver Shadow.
A total of 30,057 examples were produced, making it the brand's most successful car up to that time.
In 2016 the brand unveiled the radically styled Vision Next 100 all-electric autonomous concept car (shown below).
Last month, CarAdvice reported that British conversion specialists Lunaz was in the process of electrifying 30 examples Rolls-Royce Silver Cloud and Phantom V.