Magnaflow 15783 Cat Back Performance Exhaust on 2040-parts.com

Future Audis may time traffic lights for you

Here's a trick efficiency-chasing hypermilers have been using for years: spotting the cycles of stoplights from 100 to 200 yards out and letting the car coast up to the light just before it turns green, then carrying on without ever letting the car come to a complete stop. These hypermilers, along with professional truck drivers, do this because they know that accelerating from a standstill burns the greatest amount of fuel, and because letting a car coast up to the light with the automatic transmission downshifting by itself is easier on the transmission than stomping on the brakes right beneath the stoplight. Oh, and it's easier on the brake pads as well.

Citroen DS3 Airflow Cabriolet heading for Paris

The Citroen DS3 Cabriolet - expected to be the Citroen DS3 AirFlow – will debut at the Paris Motor Show next month. The Citroen DS3 is still – three years on from its launch at the Frankfurt Motor Show in 2009 – one of our favourite cars. It looks good, goes well and has a Gallic charm that’s almost unrivalled.

Concept Car of the Week: Renault Altica (2006)

Back in 2006 Renault was still well into its design-leadership stride, if perhaps not for much longer. The Altica concept, shown at that year's Geneva motor show, showcased all the French brand had to offer at that time – a brilliantly brave, architectural interior, a style that could only be associated with its country of origin and an interior that thoroughly questioned and readdressed layout, control and format. It also served to preview the renaissance of the Shooting Brake that the industry is still experiencing.