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

Concept Car of the Week: Citroën C-Metisse (2006)

Citroen was on a roll back in 2006, in terms of its production cars such as the C4 and C6, but most notably in advanced design. The previous 'C-' range of concepts that started in 2002 with the C-Airdream, swiftly followed by the C-Airlounge and C-Sportlounge. But there's a feeling that the this fourth car in the series was the one that showed the PSA design team at its flamboyant best.

Concept Car of the Week: Saab Aero X

In January 2005 Bryan Nesbitt, then-executive director of GM Europe Design, charged the 15-strong Saab Advanced design team in Gothenburg, Sweden, to create the "ultimate vision of the brand". The design team – led by head of Advanced Design at Saab, Anthony Lo – worked on a number of sports car proposals, which were considered 'the jet fighters of the road.' The chosen proposal by Alex Daniel was for a large, front-engined sports car that would become one of the most universally acclaimed concept cars of recent times. Of course the Aero X's door arrangement – complete with huge, forward-hinged canopy – is its party trick, but even without the theatrics the car's proportions, surfacing and graphics are exceptional.

Infiniti at Geneva: Infiniti M35 Hybrid (2011)

The Infiniti M35 Hybrid gets its first day out at Geneva Infiniti haven’t even got round to launching the latest M Line cars in Europe (and we didn’t even get the last version of the M) but they’re already showing the ‘Eco-M’ – the Infiniti M35 Hybrid – at Geneva this week. If you’re familiar with the Infiniti range of engines (which isn’t all that likely as they’re far from ubiquitous in the UK and Europe) you may be asking yourselves ‘Why M35? Surely the Infiniti would be the M37?’ And you’d have a good point, as the 3.5 litre V6 is the Infiniti engine out of the old M Line (which Europe didn’t get) not the new 3.7 litre (which it will).