95 96 97 Lexus Ls400 Duct 17750-50010 on 2040-parts.com

Suzuki Regina, Q-concept, Swift EV (2011) first pictures

Suzuki is showing its vision for an aerodynamic city car at the 2011 Tokyo auto show: the regally named Regina. It's pitched as a radical 'next-generation global compact car', which sounds suspiciously as if it could have production intent. The new Suzuki Regina is all about minimalism: it weighs just 730kg, so it only requires a small capacity petrol engine, which brings emissions down to 70g/km and appetite for unleaded at a rate of 90mpg.

Nissan mobility concept (2010): it's Nissan's Twizy

You'd be forgiven for thinking we'd mistitled a story about the Renault Twizy. It's not - take another look and you'll spot important differences. Like a Nissan badge.

Concept Car of the Week: Mazda RX500 (1970)

Developed by the Toyo Kogyo Company's advanced design and engineering team, the Mazda RX-500 was described as a ‘mobile test bed for high-speed safety'. Looking at its design, the team's childlike enthusiasm has shone through, resulting in a very cool concept.  From the rakish front to the wraparound windscreen and on to the bread van rear, everything communicates high-tech and ‘70's futurism while also channeling a little of the Star Wars X-Wing. Thanks to plastic body panels, the concept weighs only 850kg and is powered by a 491cc rotary engine delivering 247bhp fitted behind the cabin, in front of the rear axle.