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New Bentley Continental GT Speed revealed

The 2013 Bentley Continental GT Speed has been revealed with 616bhp, new gearbox and improved economy. Arrives October 2012. Regular readers will already know that the new Bentley Continental GT Speed debuts at the Goodwood Festival of Speed at the end of the month, but Bentley has now revealed their new GT Speed ahead of that public debut.

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.

Bentley brings even faster Continental V8 S to Detroit

Bentley first showed the Continental V8 S at the Frankfurt Motor Show a few months ago, but the slightly more powerful V8 Continental makes its North American debut in Detroit. More horsepower is always welcome, and the handsome new grand tourer delivers precisely 21 more. While Bentley has been concentrating on W12-powered Speed models -- even suggesting that it might be an entertaining drive on a racetrack -- the V8 range has been bolstered by its own modest performance enhancements: 21 more horsepower and 15 more lb-ft of torque bring the 4.0-liter engine's figures up to 521 and 502, respectively.