Just cos it has a badge on it, doesn't mean it is so. Someone with a sense of humour I suspect.
Our hosts have for sale deck lid badges which denote engine sizes that were never mass-produced by Porsche - fabricated for the R Gruppe crowd.
I remember back in the 80's when Rinspeed modified a 911 to a slant nose using the headlights and the rear turn signal lights from a 928 and badged the car "939"
Closer to home, there's a 912 running about with a 356D badge on it.
