Yup. Those slippers look so fast that you them to have a Volvo petrol V8 hidden away somewhere. Forgot about pace restrictions on non-tidal Thames.
Some Rivas of course have two of the buggers buried in the back. Saw them for hire in Monte Carlo when at a conference there (couldn’t afford it under own steam). Very frustrating seeing them floating elegantly in harbour begging to be taken out. Couldn’t even afford to sit in one!