Well, we didn't see this one coming: Porsche is cryptically threatening to make a road-going version of its current-day 963 Prototype race car. How do we know this? On Friday morning, Porsche USA ...

Showcased here for the first time as part of the company’s new ‘Porsche Unseen’ book, this vehicle is known as the Vision 920. While it will not spawn a road-going model nor a new race car ...