I am not sure everyone is speaking the same language here. A UK gallon is 25% bigger than a US gallon, so UK mpg is correspondingly higher. Also the testing is presumably different, so numbers measured in the UK are not comparable with US numbers even taking account gallon size differences.

I assume the questioner is asking about US mpg? The Prius was there for sure in US mpg (just, at 51mpg), not sure about others.

* The 2010 Toyota Prius had 51 mpg. * Volkswagen Golf TDI Bluemotion (Diesel, around 62 mpg) * Volkswagen Polo Bluemotion (also Diesel, closer to 71 mpg) * Peugeot 3008 Hybrid4 (Diesel, around 68 mpg, some tests speak about 74 mpg when driven with some sense.)

Pretty much anything with a 1600cc-ish diesel engine, from Europe.

Ford Transit Connect, for example, which could just about do 60mpg on a steady 70mph motorway run.

> OK, I'll bite. Name 2 or more cars from 2010 that got better than 50mpg. I'll wait.........

Not 2010, which makes this so infuriating..

A 1986 Honda CRX HF was rated 51 MPG highway. That was an engine with stone-age technology, and it was possible.

Just imagine +40 years of incremental development with modern materials and modern engine control systems. What could a 2026 Honda CRX HF do in MPG if that development had been allowed to continue all these decades? Certainly above 60, probably above 80 MPG? Maybe above 100MPG.

Instead society is selling us 6000+lb monsters with worse mileage than back in the mid 80s.