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

Driven: BMW Z4

Loved as it may be by its loyal fanbase, the outgoing Z4 was always something of a mixed bag in terms of design. While the car's classic long-bonnet, cab-back profile and short overhangs should have pleased the eye, the BMW's sheer frontal mass made its proportions seem out of balance. The application of the company's then-new ‘flame surfacing' form language also generated a visual business that seemed out of place on something as conceptually simple as a roadster.

Audi R8 GT Spyder (2011) sketches

This is the car to render the Lamborghini Gallardo Performante pointless – it’s the Audi R8 GT Spyder, a drop-top version of the lighter, faster R8 GT coupe. Previewed in these design sketches from Audi, the R8 GT Spyder is expected to be revealed in full at the 2011 Frankfurt motor show in September. So this Audi R8 GT Spyder is a R8 GT without a roof? Essentially, yes.

Lexus LF-A Roadster (2008): first official pictures

By Guy Bird First Official Pictures 15 January 2008 14:16 While we wait for Lexus finally to turn its long-awaited 200mph V10 LF-A supercar coupe into a production reality, Detroit showgoers had to make do with this roadster version. Still, the unveil of the ‘new’ sawn-off variant was one of the few Detroit surprises not known about beforehand, and offers an enticing glimpse of how the LF-A franchise could develop. Beyond the lack of a roof, the basic body shape is the same as the now-familiar LF-A coupe first unveiled at the 2005 Detroit show.