Greetings from Finland!
New at the forums, although have been reading like an year now.
I own a year -99 Rover 200 with the 1.4i petrol engine car, it has 103 horsepower so it has some potential. Still a nice gas saver I believe and can be made better fuel economy with few moderate and decent aerodynamic mods.
I've decided to buy myself the MPGuino since the car itself doesn't actually have OBD-II (so can't install ScanGauge-II). It has this port called MEMS3 which has some similarities with OBD-II but doesn't work with SG-II. This is my best idea to safe petrol while driving.
Here are some specs I found (source: rover200.org.uk):
Imperial MPG
Urban 31.9
56 mph 51.4
75 mph 38+ .5
Cheers to all!