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

First Sight: Holden Torana concept

Holden has stolen the limelight at the opening of the Australian International Motor Show in Sydney, unveiling a ground-up concept car dubbed the Torana TT36. The concept revives a famous Australian nameplate from the 1970s - appropriate since, like the original Torana, it features rear wheel drive and a six cylinder engine. That's where the similarities end, however, as the new Torana's engine is an experimental 280kW/490Nm twin turbocharged version of the new global V6 Holden has begun manufacturing for various parts of the GM world and which will eventually be used by Alfa Romeo.

Ford C-Max Energi and C-Max Hybrid (2011)

Ford has unveiled two new hybrid vehicles at the 2011 Detroit motor show, the plug-in hybrid C-Max Energi, and the C-Max Hybrid. Both are based on the five-seat Ford C-Max, and the pair go on sale in North America in 2012, while European sales follow in 2013. Both the Ford C-Max Hybrid and Ford C-Max Energi use an Atkinson-cycle (like the Prius) 2.0-litre petrol engine and lithium-ion batteries.

Ferrari shows next Enzo's HY-KERS V12 at Beijing

Ferrari stole a surprise march at the 2012 Beijing auto show when it announced a few details about its forthcoming Enzo successor. The powertrain you see here is essentially the hybrid supercar architecture which'll underpin the new hypercar being readied for launch later in 2012. Ferrari chief Amadeo Felisa told CAR the electric powertrain would lop 10% off the 0-124mph time - and its V12 is related to that in the F12, but with more power and 40% lower CO2 emissions.