Can EVs do better than 100mpg?

I recently watched a brilliant video from Autocar, where one of their writers sets out to answer a deceptively simple question:

Can an old diesel car really average 100 miles per gallon in the real world?

The car is an Audi A2 1.4 TDI, and the result is genuinely impressive.

If you haven’t seen the video yet, it’s well worth a watch:

👉 https://youtu.be/q1YmIpCEym8

What I liked most about it is how honest it is. This isn’t a laboratory test or a steady motorway crawl — it’s real UK driving, with towns, dual carriageways, motorways, rain, traffic, and compromises.

Watching it made me wonder something slightly different:

If a car can do 100 mpg, how much does that actually cost — and could an electric car cover the same distance for less?

One thing the Autocar video makes [...]