fuel economy can be effected by so many things, so its pointless trying to
compare them, but the biggest factor is how you drive it, I imagine when they
calc fuel economy its done with scientific calculations where each rev and gear
change is calculated to be at the max fuel efficiency setting or they employ a very good test
driver...
when I worked for the RAC they used to sell some sort of Driver
training course amongst some of the Fleet services they provided for company car
drivers and they guaranteed that after an afternoon sitting next to their
instructor you would reduce your MPG's, think is the course used to cost you
about £150 so god knows the additional miles it would take to pay that off, but
think that was one of the first things to go once Aviva got their fingers into
the company.</font>