Saw a few bikes while out near ESK ( Nth West of Brisbane ) today ....this one was the only one worth looking at ....!! ... love them old British Bikes.
Those old bikes are lovely. One of my friends still has a BMW R65 which he bought new around 40 years ago, it's still going strong as still looks as good as the day he got it.
I also thought I would post a picture of a modern Rocket 3, not BSA but Triumph. 2300 CC motor, 0 to 100 km/h in 2.7 seconds and a top speed of 340 km/h
The performance figures in the OP are somewhat exaggerated, MCN reviewed the 2020 model and suggested that the top speed was 220 kph. I have a BMW 1150 twin that makes 3.7 secs on the dyno and I do not believe that one could ever ride it like that. That said the Rocket 3 is an amazing motorcycle and does not feel heavy under you.
Greg.