130kn in level flight, at about 75% power, burning around 15 litres per hour
I have to say that sounds a bit unlikely. My Pioneer was quite a slippery machine, with retractable undercarriage. I would get 135 kts for around 20 litres per hour or 115 kts for 15 litres per hour. I would be surprised if the machine quoted would do better than that.
Interesting really how aviation has gone in phases and that we are now returning to a period when cheaper more frugal aircraft are rising in popoularity but that this is seeing a resurgence of older designs in terms of their relevance and economy. Powerful, high compression engined high speed tourers were a trend which started in the post war years when people started to be able to afford such things. I guess the trend was set by the likes of the V tailed Bonanza and very much lead by the US.
Fuel and maintenance costs are driving people irrevocably away from such aircraft. It is interesting that in terms of capital cost as well as cost of ownership machines such as the Jodels and lower powered Cubs are giving the new LSA types a run for their money on every front except cruise speed.