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

Motorists to set own speed limits in Australia?

You can always rely on the subject of speed limits to result in a heated debate. We only need highlight the recent furore over the government’s plans to introduce a 60mph limit on a 32-mile section of the M1 to make our point. But how about a scenario where you, the motorist, select the appropriate speed limit?

New Mercedes-Benz S-class spotted in SoCal

The new Mercedes-Benz S-class must be hustling toward the developmental-cycle finish line, because it's been spotted en masse in places such as Toronto (where it must be undergoing cold-weather testing) and Irvine, Calif. (where it must be gauging the interest of Benz-crazy vox populi). Because as devoid as it is of bodywork-breaking pillboxes, camera-obfuscating swirl paint, and surly engineers, the fact that it's seen here in little more than some sticky paper and a pair of cheap sunglasses on the driver means that the elder statesman of the automotive world is readying its next debut.

Infiniti fast tracks small diesel engines

Infiniti is fast-tracking new small diesel engines in the wake of the Daimler-Renault-Nissan partnership signed today in Brussels.Nissan's upmarket division will take supply of Merc's smaller four-cylinder turbodiesels - at a stroke thrusting it into the heartland of the executive sector. At present, it struggles to compete with its 3.7-litre V6 petrol only range of G saloons and coupes, and large-engined SUV crossovers. Sooner than you might think.