Mazda: Rx7 Turbo Ii 1988 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.

Mercedes C Class BlueEfficiency – now even more efficient

Mercedes C Class BlueEFFICIENCY now has new, more frugal engines And the new engines Mercedes has announced for its C Class BlueEfficiency are quite remarkable. Already available in the new Mercedes E-Class, they offer remarkable economy whilst still producing a very drivable car. The new Mercedes C220 CDi Blue EFFICIENCY delivers 170bhp and a 0-60mph of 8.4 seconds, but averages nearly 59mpg and only emits 127 g/km o2.

Renault Frendzy concept (2011) first official pictures

Renault has revealed its new 66bhp electric city vehicle – the Frendzy – and in true concept car style it features non-symmetrical doors (think Mini Clubman) and a TV screen instead of a rear window on the other side (think Pimp My Ride…). This is the 'Work' instalment of new styling chief Laurens van den Acker's series of concept cars showing the different sides of Renault design. It's also a hint of the new Kangoo. Not a great start then.