They don't make Crown Victorias any more. Most of the taxis I see are minivans now, but I don't live in a city where you can hail a cab, you have to call. Police are either driving Dodge Chargers or the Ford Interceptor that is built just for police duty, not available to the general public. Not many large, comfortable, four door, rear wheel drive cars around anymore except luxury vehicles that are too expensive to be practical as fleet vehicles. The minivans seem to be a good choice, doubt if they last as long as a good old fashioned heavy metal sedan though.
In the UK regular
hackney carriage taxis have had to go to minivans, like the Ford Connect, because of the disability laws. And just so everyone is clear
...the Crown Victoria is a Ford, and the Crown Comfort is a Toyota, which are still being made and very common in Asia, especially as taxis.
Crown Comfort HK taxi, and many of them are LPG powered now.
Where I am, there can be as many taxis on the road as there are private cars. Thing is here, taking a taxi is very cheap, maybe equivalent of $1-$2 to get very much anywhere in Xilinhot. The buses stop at 7PM, so if you don't drive or want to cycle or walk, very much have to take a taxi to go anywhere in the evening. Same for most smaller Chinese cities. Owning your own car can be relatively expensive.
The Crown Comfort is quite an old fashioned square looking car by modern curvy standards, and is rear wheel drive. But it was designed to carry people and their luggage, do high stop/start mileages, be reliable and last a long time, and they're often on the go 24/7. There's also a version with a bench front seat and column gear change, so it can take 6 people safely. Most sedans were only designed to take 5 people.
Typical Chinese police VW.
Chinese police are mostly using things like VW sedans, although various SUV type vehicles are popular as well, especially Toyotas and Nissans.