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

Porsche 911 Carrera 4 (2012) first official pictures

Porsche has a new four-wheel drive - but it's not the Macan crossover, or an SUV of any description. The new-generation 911 has had the all-paw treatment, growing wider wings and fatter tyres in the process. It's also lost around 65kg compared with the old 997 Carrera 4, and Porsche claims it's a good deal faster too.

2013 Audi S8 engine tech laid bare in new videos

Here's one for the tech geeks: Earlier this month we drove the 2013 Audi S8 sedan, where we came to the conclusion that the 520-hp, 4.0-liter twin-turbo V8 was just right for the executive-class cruiser. The S8 is a heavyweight, but it moves like a cruiserweight or better. The 0-to-60-mph sprint takes just 3.9 seconds, or about the same amount of time it takes to sneeze, wipe your nose and get blessed.

Ford reportedly to shut down Mercury

The Mercury brand, rumored to be on the verge of death several times over the past decade, would be shut down under a plan being prepared for Ford Motor Co.'s board of directors, Bloomberg News reported on Thursday. Citing two executives who have knowledge of the plan but asked not to be identified, the news service said the plan would be submitted to Ford's board in July. How quickly Mercury would be shut down depends how quickly the automaker can convince Lincoln Mercury dealers to close or merge with a Ford-brand dealership, the report said.