porsche 918

Ever since the Porsche 918 Spyder debuted as a might-never-be concept at the 2010 Geneva Motor Show, we knew it was quick. But we didn't know just how quick. Porsche has announced that the hybrid supercar outperforms its previous, already-impressive estimates.

First shown as a concept in 2010, the much anticipated Porsche 918 Spyder plug-in hybrid has made its debut in production ready form at the 2013 Frankfurt Motor Show.

Nestled amongst this mouth-watering automotive array at this year's Pebble Beach Concours d’Elegance was the “concept lawn” – a showcase of over twenty concepts cars and new production models including world and North American debuts. Here's our selection of the best the lawn had to offer.