Ha ha ha! Dude, you mention "cars similar to yours" - so what, british cars, 4x4s, same model year, diesels? If you want to call the topic police, you better get the off topic SWAT team in this forum, we are always wandering around crossing threads....!
As for amber in the UK it stands for both "go!" and stop - depending on whether it is by itself or with red.
Without wishing to go off topic, you mention we accelerate off the line over here - i don't, i try and set off smoothly to keep out of the "Power" zone.
I suspect many people do set off in far less economically minded manner though.
Who puts the engine choices in/on the website? Some cars seem to have half a dozen variations of the same engine. Some seem to have very few options. Seems like it's users adding them and not all users are created equal. Combine that with some people being so completely not car people and it's not too surprising some are wrong.
Re the OP's question, yeah, I do know the engine I have -- a 3.0L V6 diesel -- however, I don't know:
If the identical engine was sold in Audi Q5s that have a 3.0 V6 diesel in my region (Canada, or Canada/US), for all model years
If the identical engine was sold in Audi Q5s that have a 3.0 V6 diesel across the globe, for all model years
I am aware that North Americans are offered far fewer engine variants than the manufacturer makes, and that North Americans tend to want bigger, thirstier engines. Relatively speaking, gasoline (petrol) is cheap in the US (more expensive in Canada).
Compare that with your local fuel prices in various parts of Europe, and you'll see why Americans don't typically buy fuel-efficient engines. Mind you, they cry at the pump when fuel prices go up and they're filling that big SUV they bought when fuel prices were low.
2015 Audi Q5 "Progressiv" + S-Line + Scuba Blue, 3.0L V6 TDI
(Highest fuel economy for all Audi Q5s on Fuelly!)