The Rolls-Royce Silver Cloud II is a luxury car built by British manufacturer Rolls-Royce. The car is an updated version of the Silver Cloud I and is itself replaced by the Rolls-Royce Silver Shadow I after a break of three years.
It is widely believed that the actual car used in the movie was Cubby Broccoli's own Silver Cloud 'CUB 1', which was also shortly seen in Thunderball (although it seems to have been repainted over the years).
The plate seen in the movie, "354 HYK" however belongs to a Bentley S1, the Silver Cloud's sister model. That Bentley could have been the car which got pushed into the lake by May Day.
Bentley 4½ Litre - Bentley 3½ Litre - Bentley Mark VI - Bentley Mark II Continental - Bentley Mulsanne Turbo - Aston Martin DB5 - Aston Martin DB Mark III - Aston Martin DBS - Aston Martin V8 Vantage Volante - Aston Martin V12 Vanquish - Aston Martin DBS V12 - Lotus Esprit S1 - Lotus Turbo Esprit - BMW Z3 - BMW 750iL - BMW Z8 - BMW 520i -
Lockheed JetStar - Bell Rocket Belt - Avro Vulcan - Kawasaki KV-107 - Little Nellie - Car Plane - Bell 206 JetRanger - Handley Page Jetstream - Cessna A185F - Acrostar Jet - Hot Air Balloon - Beechcraft Model 18 - Zorin's Blimp - British Aerospace Harrier T10 -
Bird One - Moonraker (Space Shuttle)
Disco Volante - Atlantis - Liparus - Wetbike - Wet Nellie - Glastron Boat - Gondola - Alligator Boat - Iceberg Boat - Stealth Ship - Q Boat