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

Mercedes’ AMG division unveils new twin-turbo V8

Those obsessed with torque bemoaned Mercedes’ high-revving 6.2-litre V8 when it was launched in 2005, but just as the world has come to accept the naturally aspirated engine, the company has now unveiled a new twin-turbo 5.5-litre V8. Up to 563bhp – which is the same as the SLS AMG – and 663lb ft, which is much more than the 479lb ft the modern-day Gullwing supercar manages. The engine is an all-new 5.5-litre V8 (5461cc to be exact) with direct-injection technology, an aluminium crankcase and two turbochargers.

New Mazda 6 debuts in Moscow

The 2014 Mazda 6 sedan will be unveiled at the Moscow auto show this week, but you don't have to fly to the Motherland to get details on the new model. We have them right here. As we expected, the new mid-sized sedan will make use of Mazda's SkyActiv technologies, including either a 2.0-liter four-cylinder engine making 147 hp and 154 lb-ft of torque, or a 2.5-liter four making 189 hp and 188 lb-ft of torque.

Renault Twingo Gordini RS (2010) first pictures

This is the new Renault Twingo Gordini Renaultsport, an upmarket version of the brilliant Renaultsport Twingo. And if you’re confused, let’s start at the beginning. Renault make the Twingo, but its tuning arm Renaultsport also tweak the city car to give us the excellent Renaultsport Twingo.