I don't get those complaining about how much LPG has gone up. Haven't petrol and diesel gone up as well? I saw some graphs showing that in Germany over the last five years or so, LPG tracks petrol pretty closely, averaging around half as much per liter for LPG. Right now it's well less than half.
Anyway, I'm reporting back. We finally did the conversion about five weeks ago, and then went directly on vacation, driving 2000 KM in the first week, and another thousand since then. Nothing to report really. It's totally fine.
We used a BRC Sequential24 which cost €1550 (about 1250GBP) out the door, and took the shop one and a half days to install.
1. BUGS: A few weeks in, it's become hard to accelerate on a cold start. The guys said this can happen and it's only a small computer adjustment. Just bring it in. It goes away in a few minutes and is such a non-issue that I haven't bothered yet.
2. Tanking: Availability is no problem in Germany. About half the garages both on and off the highway have it - well maybe fewer, but it's not at all hard to find. The lowest I paid was €0.76/liter (62p) and the highest was €0.84 (68p). Super was averaging €1.69 (1.37). Tanking itself is a bit of a pain however. You have to screw on this stem, attach, and then hold down a filler button on the pump, which is pretty stiff. Makes my hand cramp up a bit actually. On disconnect there is a pressure release blast from the nozzle. Make sure you stand well back or you will stink of gas the rest of the day. A bit of a pain, but one I can live with.
3. Performance: Acceleration is a bit reduced, but I think no more than 10%. I only notice it in heavy traffic, or when I want to pass in the countryside. The thing is that you can switch back to petrol in about a second, so I run petrol when I want or need the performance. As to mileage, I think we get about 15% less than with petrol. At current prices that still translates to about a 50% reduction in fuel cost per mile.
4. Cargo space/weight: The gas tank is a big doughnut which drops in the spare tire well. I think it's 53 liters. So you have to decide whether to put the spare in your trunk or risk leaving it behind. We opted for the latter, and I put a can of Flat-Fix in the car instead. I haven't noticed the increased weight. Handling feels the same, but I haven't yet had a chance to really open it up in the mountains...
A few photos:
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Whether or not this technology is worthwhile depends on many factors, local pricing and availability among the biggest. My wife and I think this was a great thing to do based on our circumstances.