Battle of the Transmissions: M/T vs. A/T

[dr. d]

are we talking about local stop and go traffic, or are we talking about long, traffic-free highway drives?

i have both AT and MT versions of the same car, and i can easily say that in everyday city driving, the MT gives me at least 10% more km/li than the AT.
i also noticed, that, on the highway, my MT was doing about 2200 rpm to do 80 kph, while my AT did about 1800 rpm to do 80 kph.

a few years back, i vaguely remember a fuel-efficiency challenge involving various locally-sourced cars, sponsored by a fuel company (?). the cars traveled on actual local roads, but with some amount of traffic control. i do not remember the results. does anyone remember this? did any of the AT equivalents out-km their MT versions?