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

Tesla Model S outselling Chevrolet Volt & Nissan LEAF

Tesla never managed to make any money out of their electric Lotus – the Tesla Roadster – but it does look like they’re on to a winner with their electric  executive saloon, the Tesla Model S. Despite moans that the headline-grabbing sub-$50k Model S was never a reality – and a starting point of $70k – the Model S looks set to outsell the two most successful ‘alternatively fuelled’ cars – the electric Nissan LEAF and the range extender Chevrolet Volt – in the first quarter of 2013. Sales of the electric Nissan LEAF, which costs from $29k in the US, in the first quarter of 2013 were 3,965 units and the Chevrolet Volt, which costs from $40k, sold 4,421 units.

Porsche 918 Spyder (2010) at Geneva motor show

Porsche has shown off this stunning new 918 Spyder concept car on the eve of the 2010 Geneva motor show. It’s a mid-engined two-seater in the mould of the Porsche Carrera GT – a landmark supercar to showcase Porsche’s technical nous. Michael Macht, president and chief executive officer of Porsche, unveiled the 918 Spyder in Switzerland, and intriguingly proclaimed that Porsche has never shown a concept car that it hasn’t put into production… Porsche’s official press release was light on the details, but after the unveil Porsche’s R&D chief Wolfgang Durheimer talked CAR around the 918 Spyder and revealed some eye-popping figures for this part-electric hybrid supercar which weighs in at 'less than 1490kg'.

Mercedes Biome (2010) first official pictures

Now, what on earth, or for that matter not from earth have we got here? It's the Mercedes Biome concept supercar. It's a product of Merc's Los Angeles design studio, and they prefer to describe it as an 'Ultralight vehicle at one with nature.' The Biome was produced as part of the Los Angeles Design Challenge, taking part alongside the 2010 LA auto show.