I'd get rid of the Rover mate,if its Only 20% better on fuel than your old Renault, as it should be at least 30% on average better.if you are still driving as you did before, and not booting the rover and enjoying its massive torque advantage. Rover co2 average will be around the 160/5 mark. An old renault 2.0lt petrol luganna will be around 211, a drop of around 20 points in Co2 like for like is worth about 5to7 miles per gallon, but if you compare the CO2 of a petrol against that of a diesel then you need to add on 20plus percent for diesels advantagesteveinleo said:Jonny, it's quite simple. I made the change from a 2ltr petrol laguna to a diesel Rover 75. To start with the Rover was and still is 20% better on fuel consumption. So yes , here in Herefordshire we have had fuel go up about 20%. That's not too startling as the average fuel price annually has gone up 15%. That was quoted by a fuel watch dog.
If you could get 40 mpg out of the lugana, then in the same conditions you should get 52mpg out of the rover.....at least