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

Mazda diesel delayed again

If you've been waiting for a Mazda 6 diesel, prepare to wait a bit longer. After delaying the US launch until Spring 2014, Mazda now says it won't meet that target date either. Mazda says the engine meets current emissions standards using only a particulate filter, but the resulting blend of performance and fuel economy isn't up to snuff.

Audi e-Tron launch now in 2012 – Torque figures rubbished

The Audi e-Tron at the LA Auto Show Audi’s electric R8 – the Audi e-Tron – was unveiled at the Frankfurt Motor Show this year and has just had its US debut at the Los Angeles Motor Show. Dubbed the Electric R8 it is in fact a stand alone car that happens to have styling similarities to Audi’s Supercar R8, but there the similarity ends. The e-Tron – which took a little of the glory off BMW’s Vision ED Concept - boasts four electric motors – one at each wheel – which produce the equivalent of 313bhp.

Mercedes-Benz C63 AMG coupe revealed

Mercedes-Benz has followed up the debut of the C-class coupe at the Geneva motor show with the unveiling of this new range-topping version, the C63 AMG coupe. Set to land in North American showrooms in September following a planned debut at next month's New York auto show, the new BMW M3-challenger receives the same updated mechanical package as the recently facelifted C63 AMG sedan. It will be sold from the outset as a 2012-model-year car.