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

Mercedes SLS AMG E-Cell (2010): the electric SLS

Following the unveiling of Tesla's updated Roadster 2.5, Mercedes is showing off its iteration of an all-electric sports car: the SLS AMG E-Cell. While the regular SLS pumps out 563bhp and 479lb ft from its 6.2-litre V8, the SLS E-Cell has four synchronous electric motors, powering all four wheels for a combined output of 392kW (equivalent to 526bhp) and a mammoth 649lb ft of torque. Crucially, all of that power is accessible from zero revs, allowing the E-Cell to sprint to 62mph in four seconds dead.

Toyota Prius with added noise: The Prius Vehicle Proximity Notification

Prius Vehicle Proximity Notification We’d much rather see a hybrid car than an electric one, but with plug-in hybrids starting to proliferate more car makers are having to address the issue of silent running endangering blind – and distracted - pedestrians. Step forward the Toyota Prius Vehicle Proximity Notification System. The US Senate signed off the Pedestrian Safety Enhancement Act at the end of 2010, which requires the makers of cars with the ability to run silently to make them run noisily instead, completely negating about the only benefit there is for electric cars.

Aston Martin ditches Cygnet city car

CITY SLICKERS will no longer be able to cut a dash in a diminutive Aston Martin, following the company's decision to axe the controversial Cygnet from its range. The tiny Cygnet, which takes its name from a young swan, was an adaptation of the Toyota iQ, refitted with the finest luxury materials and priced at over £30,000. Its low CO2 output is rumoured to have been the main reason for the model’s presence in the range, since Aston Martin could in that way lower the company’s average CO2 output across the range in line with European emissions rules.