That is indeed pretty good, as I had an Audi 80 with the AAZ engine (and it was bobbins) that only every returned 40mpg max, IF I sat at 70mph like a granny.
IIRC, the book figure for that engine (in the Audi at least) was only 43mpg, and the 1Z engine, a whopping 54mpg!
Cheers,
Tom