The standard london taxi, a lot of them are still running on 1950's landrover diesels, the slightly newer ones run an 80's nissan/isuzu IDI motor, then the very new ones run a euro iv diesel from about 10 years ago. Considering there are so many of them, and they spend 99% of their time in the city at inefficient speeds and driving cycles I'd have thought it was key that these vehicles are the most efficient/ emission regulated and NOT that guy that drives down once a year into London in his 1999 VW T4 from Bedford to help his mate move house. But thats just my view!
^^^^ This.
The standard london taxi, a lot of them are still running on 1950's landrover diesels, the slightly newer ones run an 80's nissan/isuzu IDI motor, then the very new ones run a euro iv diesel from about 10 years ago. Considering there are so many of them, and they spend 99% of their time in the city at inefficient speeds and driving cycles I'd have thought it was key that these vehicles are the most efficient/ emission regulated and NOT that guy that drives down once a year into London in his 1999 VW T4 from Bedford to help his mate move house. But thats just my view!