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

Rinspeed to debut autonomous XchangE concept at Geneva motor show

Dutch coachbuilder Rinspeed has built a reputation for imagining and creating cars from 10 years in the future and making them a reality, either for well-heeled customers or for auto show crowds. So it came as no surprise when it revealed its newest project slated for the 2014 Geneva motor show, meant to preview the interiors of the self-driving cars of tomorrow. Yes, that's a Tesla Model S underneath with a (mostly) muted restyling of the front fascia, though it is really the interior that's meant to be the showpiece.

Nissan Leaf tours the country

Those who haven't made it to the dealership to test drive a Nissan Leaf can get behind the wheel of the electric car when the carmaker swings through towns across the country on its Drive Electric tour. Started on July 8 in Long Island, the tour is visiting 26 cities from Indianapolis to Austin, Texas. Attendees will learn about driving and owning a Leaf, how the car compares with other vehicles, its fuel efficiency and environmental impact, and how to communicate with the car via phone or computer.

The Porsche P1 is lighter, greener and more exclusive than McLaren's new hypercar

Long before the legendary Porsche 911 -- before, even, the Porsche 356 -- Ferdinand Porsche was tinkering with alternative powertrains and designing road-worthy vehicles. Though it wasn't the first vehicle to bear his name, the “Egger-Lohner electric vehicle, C.2 Phaeton model” was the earliest result of his efforts. Perhaps getting the jump on the modern alpha-numeric craze/plague, it was shortened to a simple “P1.” The P1 (we'll refer to it as the Porsche P1 from here on out to avoid confusion) made its first appearance in Vienna on June 26, 1898, and it didn't last long in the public eye: Before Porsche decided to pull it out and put it on display, it had reportedly been sitting in a warehouse, untouched, since 1902.