they are British cars, so parts will fall off randomly and the electronics (outside of the engine control module) tend to be cheap.
My Dad had a Sterling for a couple years back in the early 90s - I swear the electrical system in that thing was infested with demons. The door locks would randomly lock and unlock themselves while you were just driving along, the alarm system would go off at random for no reason whatsoever, both while the car was sitting in the driveway on a calm night (seriously, didn't even need a stiff breeze to set it off) and sometimes while you were driving it. You could be in traffic and for no apparent reason you've suddenly got the emergency blinkers on, the headlights are flashing and it's honking at everyone around you. Charming during rush hour, I tell you.
Also, my folks are heavy sleepers so sometimes the alarm would go off in the middle of the night. They'd sleep right through it more often than not. The neighbors sure didn't though.
Sometimes the radio station would change on it's own, and occasionally every light on the dashboard would light up (high beams, low fuel, check engine, low oil pressure, etc.) all at once.
That kind of put me off British cars.