Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Video: Adrian van Hooydonk on the BMW 4-Series Coupe concept

BMW's Director of Design Adrian van Hooydonk explains the design strategy behind the 4-Series Coupe concept's design in a video interview filmed at the car's reveal at the Munich Design Night. He talks us through how the design team played with the wheelbase length to create new shapes and convey a sense of "elegance and power". Check out the full story and gallery of the BMW 4-Series Coupe concept for more information on the car that will replace the 3 Series coupe.

Infiniti JX Concept finally revealed at Pebble Beach.

Infiniti JX Concept finally arrives at Pebble We’ve managed to stick with all the teases we’ve seen for the Infiniti JX, or at least from then second JX tease onwards. Despite terminal boredom by the end. So it seems fitting that we should bring you the Infiniti JX in all its glory now it’s finally arrived at Pebble Beach.

Citroen Numero 9 'will influence all future DS models'

Citroen's Numero 9 concept car previews the new face of all future DS cars from the French manufacturer, the design chief told CAR. Thierry Metroz, director of design in Paris, said the Numero 9 was an ideas car, but admitted it would influence the look of production cars in the near future. 'Look very closely at the grille - it is much more three-dimensional,' he said.