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Porsche buyers put the brakes on stop-start technology

By Chris Chilton Motor Industry 23 June 2008 18:56 Direct injection and a clever new PDK dual-clutch gearbox have cemented the new 911’s reputation as the greenest performance car around, but Porsche engineers are being hampered from making the iconic sports car even cleaner by the public’s reluctance to accept further green technology Engineers at the launch of the facelifted 911 told CAR that fitting a BMW-style start-stop system could chop a further 10g/km from the Carrera’s 225g/km CO2 rating but that performance car buyers weren’t keen on having such overtly planet-conscious tech on their cars. Start-stop works by cutting the engine when the car’s stationary in traffic, and restarting automatically when you touch the pedals to move off again. Every manual transmission-equipped BMW 1-series comes with the technology, excepting the truly high performance versions.

Sky takes Mazda powertrains to the next level

Mazda's next-generation of powertrains, called Sky, will feature a variety of new technologies that company engineers say improve fuel efficiency by 20 percent. The Sky engines--Sky-G for the gasoline version, Sky-D for diesel--coupled with a Sky-Drive automatic transmission or a six-speed manual, were offered for test drives during a technology day in Berlin. The Sky-G engine we drove was a 2.0-liter inline-four that made 160 hp and 155 lb-ft of torque.

Concept Car of the Week: Audi Rosemeyer (2000)

When the Volkswagen group opened Autostadt in June 2000, rumors of a mysterious prototype drew the crowds in the Audi Pavilion. The German brand unveiled an impressive concept that crystallized its latest design philosophy, while also nodding to its glorious racing history. Designed under Peter Schreyer's supervision, the rounded volumes of the Rosemeyer are animated with precise geometric details expressing quality, rationalism and honesty – the foundations of Audi Design.