Rolls-Royce had built three or four of these engines while developing the Phantom and then stuck them away in a warehouse somewhere. BMW experimented with a V16, eventually showing a 9-litre (~550 CID) version in the Rolls-Royce 100EX concept car, but it has been changed to a V12 for production due to the customer feedback. However some of the Rolls-Royce Phantom Coupés are powered by a V16 engine. That was not BMW's first foray into V-16: BMW had conceived the Project Goldfish, adding four cylinders to the BMW M70 V-12 motor. The BMW Goldfish V16 motor had the displacement of 6.7-litre (414 CID), putting out about 408 hp (304 kW) and 637 N·m (470 lb·ft). That motor was also trialled in new Bentley Mulsanne in the early 1990s.
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