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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.

Rubens Barrichello does Top Gear

Rubens Barrichello does Top Gear this weekend Top Gear does like to get a Formula One driver or two to drive their track in a reasonably priced car. They’ve not managed to grab the whole grid yet – and they’ve also included a few golden oldies like Nigel Mansell and Damon Hill – but a lot of the big names seem to be persuaded it’s a bit of fun worth having. The top contenders this year have all been to the TG track, bar one.

BMW 3 Series GT revealed

The BMW 3 Series Grand Turismo – the third model in the BMW 3 Series range – has been revealed ahead of a public debut at the Chicago and Geneva Motor Shows. Now, BMW has revealed a little brother for the not exactly super successful 5 Series Grand Turismo, in the guise of the new BMW 3 Series GT, a slightly ungainly looking 3 Series that’s almost as big as a 5 Series and will cost around £3,000 more than the 3 Series saloon. Stretched by 110mm in the wheelbase from the 3 Series Touring – and a full 200mm longer – the 3 Series GT will, say BMW, offer the dynamics of the saloon with the practicality of the Touring.