When the Pagani Huayra R was announced, one thing that caught my attention were the statements

“designed from the ground up in partnership with HWA AG”

”The cutting-edge components especially created for the Huayra R include the brand new six-speed sequential gearbox which has been designed, along with the Huayra R’s engine, in collaboration with HWA AG to complete a tailor-made powertrain.”

which i assumed meant it was a brand new engine but recently read two articles which makes this confusing.

Wikipedia states:

The Huayra R uses the “Pagani V12-R”, a version of the 6.0 L naturally aspirated Mercedes-Benz V12 engine built from the ground up by HWA AG

Goodwoods states:

and the Huayra using a bespoke HWA V12, based loosely on a Mercedes casting.

So the engine is bespoke and built from the ground up and at the same time based on another engine ?? Isn’t that contradictory ??