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

2011 Audi R8 GT, an AW first look

Three years after it burst onto the supercar scene, Audi has unveiled a hard-core version of its R8 called the GT. Based on the existing mid-engine R8 V10 and incorporating aerodynamic, weight-saving and mechanical developments used by the company's R8 LMS GT3 race car, Ingolstadt will build just 333 copies of the new 560-hp four-wheel-drive performance flagship. Pricing has not yet been revealed, but given the extent of the changes to the new two-seater, buyers should expect a hefty premium over the R8 V10's $147,000 price tag when the GT goes on sale in North America.

Porsche 918 Spyder starts at $845,000

Porsche has officially put the 918 Spyder on sale for a breathtaking MSRP of $845,000. And, as an incentive to those who order the supercar, Porsche also is offering the opportunity to buy a limited-edition 911 Turbo S, called the 918 Spyder Edition. It will cost $161,650 for the coupe and $173,050 for the convertible.

BMW's Domagoj Dukec on the 4 Series Convertible [w/Video]

BMW's head of exterior design Domagoj Dukec has explained how the 4 Series Convertible's design sets it apart from the 3 Series in a new video. Dukec says that aside from the fact the 4 Series Convertible is visibly wider than its predecessor with an increased track and wheelbase, its design is unique. While describing the changes to features such as the kidney grille, headlamps and the lines running down the hood, Dukec also compares it to the coupé.