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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.

Subaru Cross Sport Concept Bows at Tokyo

With little fanfare Subaru showed two promising concepts at the Tokyo show, both based on iconic Subaru performance cars. The Cross Sport Design Concept is an SUV/wagon body that rides on BRZ mechanicals. Think of it as a BRZ wagon, offering the nimble tossability of the sporty BRZ coupe with the roomy practicality of a wagon.

Jenson Button in McLaren P1 (2013) supercar fly-by

McLaren’s P1 supercar trundled out for its first official drive-by today, when F1 driver Jenson Button drove it into McLaren’s Woking citadel before unveiling his 2013 race car. The stunt confirmed that the P1 can manoeuvre on electric power alone, unlike Button’s MP4-28: the race car’s hybrid KERS system is used to deliver a short power boost to supplement the V8. McLaren predicts the P1’s electric-only mode is a capability its forthcoming Ferrari rival (codenamed F150) won’t be able to match.