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

Audi A6 (2011) first official pictures

Essentially an A7 fastback in its work clothes, the new Audi A6 saloon is lighter, greener and more tech-heavy than ever.  The mini-A8 styling is more evolutionary than revolutionary, but underneath the skin are some key key changes, including the addition of a hybrid drivetrain. Initially the A6 comes with a choice of five engines: a pair of petrols and three TDI units. And because all new A6 engines are linked to efficiency-enhancing systems like start-stop and energy recovery the average consumption across the range has been dropped by 19%.

More Power! Get the details on the potent Porsche 911 GT3 RS 4.0

Porsche has ramped up the already heady performance of the 911 GT3 RS through the adoption of a new, naturally aspirated 4.0-liter version of the company's sturdy, horizontally opposed flat six-cylinder engine. The unit kicks out 50 hp more than the 3.8-liter six-cylinder used in the existing 911 GT3 RS. This mill claims 500 hp at 8,250 rpm, a figure which makes the speedster the most powerful naturally aspirated road-going version of the 911 ever.

Volvo confirms big production increase for V60 Plug-in Hybrid

Volvo has been building around 150 V60 Plug-ins a week at its facility in Torslanda – alongside the regular V60, V70, S80 and XC90 – but that is now set to be upped to 282 cars a week for the rest of 2013, with plans to build at least 10,000 in 2014. The fact is that the V60 is a very appealing estate car already, and bolting a plug-in hybrid setup has turned it in to a big hit in showrooms because the barking mad official economy and emissions system bestows the V60 plug-in with emissions of just 48g/km, making it a real no-brainer in countries where governments blindly tax cars based on their official emissions. That means countries like Holland, where Volvo has received more than 3,000 orders for the V60 Plug-in, and the UK are lapping up the hybrid offering from Volvo as a way to escape big taxes and still have a swift (0-62mph in 6.1 seconds), appealing and stylish car.