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

Porsche 911 50 Years Edition (2013) at Frankfurt motor show

Here’s the inevitable special edition 911 to celebrate Porsche’s rear-engined icon’s half-century. The 911 50 Years Edition uses the Carrera 4’s 44mm-wider-than-standard body, rear-wheel drive and the Carrera S’s 395bhp 3.8-litre flat-six engine in either seven-speed manual or PDK form. In a nod to the 911’s birth year, only 1963 examples will be produced, each costing a cool £92,587 – a £10k premium over the Carrera S.

Some hybrids are not a green as they seem, interest group says

Car buyers who think they are helping the planet by choosing a hybrid vehicle to aid in cutting emissions don't always get the biggest bang for their buck, according to an environmental interest group. A report from the Union of Concerned Scientists shows that some hybrids come at a much higher price tag than their similarly equipped, conventional-powertrain counterparts, yet offer little in the way of environmental gain. These not-so-green hybrids compromise their value or eco-friendliness in a variety of ways.

Porsche Panamera Sport Turismo concept (2012)

This is the new Porsche Panamera Sport Turismo concept car, unveiled on the eve of the 2012 Paris motor show. We hear that we won’t see a Sport Turismo version of the current Panamera, but this concept instead previews the facelift treatment that will be applied to Porsche’s four-door saloon as part of a mid-life refresh in 2013. And beyond that the Sport Turismo showcases a second bodystyle than will join the range when the Mk2 Panamera appears in late 2015.