I believe the police used them as unmarked cars in the late 60's together with Sunbeam Tigers with optional 4.7 engine, if I got my facts right.

In the early 70's I had work colleagues with both although only the cooking 4.2 Tiger. Golden days innocent

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone