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Acura retools lineup to put the focus on mpg

Honda will overhaul and reposition its Acura lineup over the next 18 months and abandon its long pursuit of top-tier luxury-car status for the brand. After years of trying to propel Acura into the front ranks with Mercedes-Benz, BMW and Lexus, Honda says it will settle for offering mid-level premium vehicles that favor fuel economy over performance. With one exception: At the Detroit auto show in January, Honda will bring back the Ferrari-fighting Acura NSX--a new version of the mid-engine supercar that disappeared in 2005 after a 15-year run.

Tomorrow’s world: Fiat's MultiAir engine tech

By Jesse Crosse Motor Industry 14 October 2009 16:50 Fiat this year launches what it claims is a big step forward in variable valve timing: MultiAir. It's the first time that a manufacturer has made a properly variable valve system a production reality, and will slowly be rolled out across most of Fiat's and Alfa's car ranges.How does Fiat's MultiAir vary from existing variable valve timing (VVT) systems?Current VVT systems rely on mechanical systems to open and close the valves. Engineers have long understood the benefits of changing valve opening and closing times to tweak an engine's power and emissions performance, depending on the need for power or parsimony.Valves are an engine's nose and mouth – it inhales through inlet valves and exhales through exhaust valves.

Diesel joins Porsche Panamera lineup

Porsche has put forward some eye-catching fuel-economy figures for the Panamera diesel--although we may never see the car in the United States. Set to go on sale across Europe in August, the four-door is claimed to return a combined city/highway driving fuel economy of 36.2 mpg in standard guise under European testing procedures. When fitted with optional low-rolling-resistance tires, the fuel economy climbs to 37.3 mpg on the European test--a figure that gives the Panamera diesel a theoretical range of 800 miles on its 21-gallon fuel tank.