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

GM's Ed Welburn walks Jay Leno through the Elmiraj concept's design [w/Video]

General Motors' vice president Global Design Ed Welburn stars in the latest of the 'Jay Leno's Garage' YouTube series, running the talk-show host through some of the new Cadillac Elmiraj concept's design features and what it means for the brand's future. We get a look at all the classic Cadillac design cues such as the vertical headlamps and tail lamps as well as the central hard crease that Welburn says is "important in every Cadillac". Leno and Welburn then move onto the Elmiraj's features, such as the large doors' integrated handles and the slimmer A-pillars before a more in-depth look at one of the concept's most striking features – the grille.

Ford Mondeo/Fusion unveiled at 2012 Detroit show

Ford unveiled its new 2013 Mondeo at the Detroit auto show - the new Mondeo is in fact now a Fusion in Euro drag. Under the One Ford rules, most major car projects are in fact global affairs, so the Mondeo follows in the footsteps of the Focus, also unveiled in Detroit two years ago and brought to Europe a year later. We'll have a similarly long wait for the Ford Fusion to make the leap to the European Mondeo, with a launch slated for spring 2013.

Contest: LA Design Challenge 2007

Audi Virtuea Quattro Designed at the Volkswagen/Audi Design Center California by Heather Shaw, Jae Min, Mattijs Van Tuijl, Karl Strahlendorf and Christian Schoen; the Virtuea Quattro is a single-seat autonomous driving machine. It functions as a solid unit at its core, while providing a myriad of possible holographic exteriors stored in a library and accessible through the vehicle's 'interactive holographic interface'.  Powered by hydrogen, the vehicle combines artificial intelligence with avenues of self-expression. The Virtuea's holographic exterior provides a variety of possibilities, allowing the driver to select from the most innovative designs from one minute to the next.