Because of emissions regulations in the city centres, VW diesels before 2015 are very costly to run in London. This means all "old" reliable diesels are unaffordable and you need to buy something newer
I have a caddy 1.6 102hp and they do not match the speedometer. about 10km per hour wrong and then it shows too fast so 140-150km not faster with a 1.6 102hp original