According to research from the Discovery Channel, the 1973 Porsche 911 Carrera 2.7 RS is the quickest-appreciating vehicle in the past decade, at least in the UK. In 2004, prices hovered around 65,000 pounds ($101,350 in current money), but buying one today would set you back over 500,000 pounds ($779,600). Rarer lightweight models go for even more.
More than just a solid investment, buyers get what is considered to be the ultimate expression of the early 911. Built as a homologation special for racing, Porsche used the classic tactic of fitting a larger engine to boost power to about 210 horsepower while simultaneously cutting weight. A lower front air dam, extended fenders for wider wheels and ducktail spoiler at the back made sure the grip, aero and styling fit the motorsports attitude.
You can get a brief taste of what it's like to drive one of these rare Porsches in the video from The Telegraph below. This one is even for sale, with an ambitious price of around 600,000 pounds ($935,000), and it also features legendary racer Derek Bell's autograph on the ashtray. Hopefully the car's eventual buyer remembers that the RS is a fantastic piece to drive, too, and stretches its legs every once in a while.