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

Driven: BMW 335i Cabriolet

The 3 series has come a long way. While the original 1975 E21 was initially only available as a two-door sedan, it was soon transformed into a cabriolet thanks to an aftermarket conversion kit by Baur. In 1982, the E30 was a two or four-door sedan until several years later, when BMW offered the "Touring" wagon and the full factory-produced cabriolet.

Hyundai Sonata revealed

The saucy new Hyundai Sonata was unveiled in South Korea this week, and it's poised to give the carmaker an upgrade in the ultracompetitive midsize-sedan segment when it hits the U.S. market in 2010. It's a dramatic departure from the current model, which is a solid if staid four-door.

Rinspeed XchangE concept previews cabin of self-driving cars

Ever wondered what you'll be doing in your car once cars become driverless? We'd probably just sit in the back seat and read the financial section of the paper (on some kind of transparent tablet computer, of course) to see how our Tesla shares are doing and make small talk about the weather with our imaginary chauffeur named James in a faux British accent, asking him to pass the Grey Poupon from time to time. But unlike us, coachbuilder Rinspeed is actually taking the yet-to-materialize issue seriously, and at the upcoming Geneva Auto Show it will debut its XchangE concept.