Fuel Economy - Cruising Speed (Petrol)

[Scottland]

I'm looking into a cheap petrol car (*ahem* Mondeo). Anyway, I'm interested in what MPG I'd get sat cruising at 70mph.

This is to compare to a diesel, my current one for instance (307 HDI) manages about 50mpg at 70.

As I said, the specific car I'm looking into is a 2l mondeo (both mk2 and mk3), but I'm also interested in what VAG engines amongst others can get.

Or what would be great, is how many miles you'd get out of a full tank with mainly motorway miles.

Cheers

 

[Scottland]

Thanks, thats the sort of info I'm after. I'm not too worried about around town as I don't drive around town that much, it wouldn't make any difference. Are other petrol engines (2litre) as frugal at those speeds?

How much does thirst vary between speeds? Say between 55 - 80mph.

For instance, in mine (according to the trip computer at least) I average 60mpg+ at 55, which drops to about 35mpg+ at 80.

Would it vary just as much?

 

[Scottland]

Cheers for the responses guys, not as bad as I'd thought.