Last year I spent a lot of time debating the LPG issue and reading a vast array of posts around the tinternet about the subject. Mostly triggered by the dramatic price rises that unleaded went through as oil prices soared. Despite a lot of negative data I decided to go ahead and have a conversion done. Partly because most of the information seemed quiet old and partly because I'm a cheapskate northerner who hates parting with £50 to fill up my 2.0 TS Lusso ! Here is the result.....
I had the conversion done in December. A toroidal tank was fitted to replace my spare (I got some tyreweld for emergencies!) and the whole job took less than a day. After an initial running in period I serviced the car, reset the Alfa ECU using Alfadiag. The installers then did thier 1 month post installation check up and recalibrate. My car now out performs it's previous petrol only configuration. I get an average of 32 mpg on an 'extra urban' cycle as long as I don't stray too far past 75 mph on the motorways but this only drops to 28mpg if I give it the lead boot treatment on the M4.
show us the money...some stunning calcualtions to consider...
Cost of installation - £1000.00
Annual mileage - 15,000
Annual fuel usage at 31 mpg = 2202 litres (484 gallons)
Annual petrol costs at 112p per litre = £2466.24
Annual lpg costs at 46.5p per litre (local price) = £1023.93
As you can see, I will recoup the costs in less than 9 months at current prices.
Feel free to ask any questions and if anyone has access to a rolling road and wants to see if my 147 still has the horses it left the factory with I'd be more than happy to put it to the test.
Not true (quite!). It will take longer to recoupe the cost than that as , on average a car will burn about 10-15% more (litres wise) when on lpg than when on petrol due to lower calorific content of LPG. I had a Audi A8 4.2 V8 on LPG. Did about 24 to gallon on petrol but only about 19-20 on LPG. Still a good saving though! Even with LPG at over 60p a litre now.