Bendix/king Kea 346 Servoed Enconding Altimeter P/n 066-3062-00 on 2040-parts.com

One Lap of the Web: Shark-jumper cars, tether cars, and Bratty cars

-- There's a Marcos for sale on eBay this week, and it's already attracted quite a few bids with nine days left to go. While you may remember what the Marcos looked like, do you recall that they were sold through the Volvo dealer network in the U.S.? Or that they used Volvo engines?

Porsche 918 Spyder races toward production

OK, let's put the usual arguments to rest first: The Porsche 918 Spyder is going to be even faster than the Carrera GT in a straight line. That's based on Porsche's own computer simulations in anticipation of the production version of the gasoline-electric-powered 918 Spyder, which is due to roll off a dedicated line within a decommissioned paint shop at Porsche's Zuffenhausen, Germany, headquarters next year. The claimed 0-to-62-mph time is 2.8 seconds; 0-to-124 mph is 8.9 seconds, and top speed should be about 202 mph, thanks in part to series of active aerodynamic functions, including a multistage rear wing.

1929 Bentley 4 1/2 Litre Supercharged. Set to be the most expensive Bentley ever?

The 1929 Bentley 4 1/2 Litre Supercharged at Bonhams 2012 Goodwood sale Bonhams are offering a 1929 Bentley 4 1/2 Litre Supercharged Racing Single-Seater at their Goodwood auction in June. The 2012 Goodwood Festival of Speed is only four months away, and one of the highlights will be the Bonhams sale of the car collection of famed watch maker George Daniels, which includes a 1929 Bentley 4 1/2 Litre Supercharged Racing Single-Seater once owned by Tim Birkin in which he set the Brooklands Outer Circuit Lap Record in 1932 at 137mph. Tim Birkin was one of the fabled ‘Bentley Boys’ and George Daniels one of the most famous horologists in the world, and the sale of this Bentley 4 1/2 Litre ‘Blower’ is bound to attract a lot of attention and interest, with every expectation it could raise as much as £4 million.