Past owners of the notoriously wheezy diesel Rabbit will find it hard to believe, but this blurry streak is also powered by a four-cylinder diesel. Two of them actually: one for the front wheels and one for the rear. Built for use in front-loaders and forklifts, the 4.4-liter engines were specially tuned to 750 horsepower each by U.K. construction-equipment company JCB as part of an effort to set a new speed record for a diesel-powered car. It paid off.

PC RevivalCost: $0-$260 Easy | | | | | Hard

Start by checking the health of your hardware with a free diagnostic program such as #1-Tufftest (tufftest.com).
If the motherboard or screen is shot, forget it. Replacing either one is more expensive and more hassle than buying a new system.
Lost your user manual? Try the manufacturer´s Web site.
Check eBay or craigslist.org for used replacement parts.

Marc Norman is standing ice-side in the new skating rink in Salt Lake City, Utah-the site of this year's Winter Olympics. It's noisy in here: Workers are installing a high-tech dehumidifying system. Speaking over the persistent clanging, Norman makes a prediction. "Once that's completed," he says, "we will be able to control just about everything that happens in this building."