Not the sound of a Wurzel expressing hatred for an arachnid, but BMW's roofless, two-seat hybrid concept. It'll be unveiled at this year's Beijing auto show later this month and is, as you'd imagine, a pretty good sign that Munich's going to give us a drop-top to join the i8 coupe. For those hard of memory, that's the 155mph, 100mpg sportster due to land in showrooms come 2014.
The i8 Spyder concept is a little stinted compared to its coupe brother, though. Under the two-section folding roof it's slightly shorter and there's a more compact wheelbase, suggesting its original proportions - based on the splendid Vision EffecientDynamics supercar of 2009 - have been rethunk.
BMW has kept the swan doors, which swivel up like the wings of a, umm, swan... They're retained thanks to the amount of carbon that's used in the i8's super-stiff passenger ‘Life' cell, which is made from carbonfibre reinforced plastic (CFRP).
Underneath, there's an aluminium chassis with a lithium-ion battery buttered along its length, keeping the centre of gravity nice and low and achieving a 50:50 weight distribution. It's got the same plug-in powertrain as the coupe, too; a petro-electro melange of 129bhp electric motor driving the front wheels and three-cylinder turbo petrol engine sending 220bhp to the rears (that's 349bhp in all).
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