Why is LPG not more widespread?

[DickP]

With wind up cars and hybrids being pushed so positively and also the supporting infrastructure, why is there a lack of encouragement coming in the form of a greater number of LPG powered cars?

[DickP]

Krikkit said:

The other problem is it's difficult for manufacturers to sell cars where they've had to ditch the spare wheel or halve the fuel tank size - that's a much easier sell for a retrofit kit.

I know of a lot of cars that don't have a spare wheel and only come with either a compressor or instant tyre weld stuff, even if there's a spare wheel well?!

I think it's a shame that it isn't being pushed at all when compared to wind up cars as an alternative fuel. It's less environmentally harmful even isn't it than running diesel or petrol?