[fgsfds028374]

It can be purchased by a consumer and driven on public roads.

In what sense is it not one?

[kwhitefoot]

It's hand built. And it would not surprise me if every one of them is different.

I can buy a Caterham-7 and drive it on public roads too. That doesn't make it a production car even though it is probably much more standardised than the Koenigsegg.