Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

McLaren 12C Spider: Official

After a tease last week McLaren Automotive has revealed the convertible MP4-12C – the McLaren 12C Spider. We did think there was a chance McLaren would try to steal Ferrari’s thunder by revealing the convertible version of the MP4-12C at Goodwood this last weekend, but they didn’t. But today the McLaren 12C Spider (not the MP4-12C Spider) is officially revealed, and by the look of it no one will be buying the MP4-12C any more.

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.

Porsche Macan gets four-cylinder powerplant

The new entry level Porsche Macan, shown alongside the new Boxster and Cayman GTS at the Beijing motor show, has become the first Porsche model since the 968 to use four-cylinder power. Parent company Volkswagen's EA888 engine -- as used by a wide range of models from Volkswagen, Audi, Skoda and Seat -- will motivate the new Porsche SUV. The turbocharged 2.0-liter inline four-cylinder direct-injection unit, boasting the same state of tune found on the Golf GTi Performance Package, develops 234 hp and 258 lb-ft of torque between 1,500 and 4,500 rpm.