Why do you need a big engine, the speed limit on the motorways in the uk is 70mph, even a poxy 1ltr powered car can achieve that and your average 1.6ltr family car can easily achieve and maintain that speed in a good degree of comfort and economy. what is it with people that want to drive big engined gas guzzlers, is something to do with the superiority complex that goes with owning a bmw???
My wife's 1.6 does 30 mpg my 2.0 and a lot larger car does 52mpg.
As somebody who drives 35,000 miles a year, I like the comfort of a slightly larger car.