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Concept Car of the Week: Buick Y-Job (1938)

Welcome to the first in a new, regular, series of features in which we highlight an important, forgotten or just plain cool concept car each week. Concept cars have thrilled and inspired for decades, testing the limits in terms of technology and design and shaping the ways cars are designed today. They're the pinnacle of our art and probably the thing that first piqued your interest in car design.

Volkswagen debuts Jetta TDI Value Edition

There was already a lot to like about the diesel Volkswagen Jetta TDI CleanDiesel, most of it having to do with fewer fillups, and so for 2014 Volkswagen is debuting a new Jetta TDI Value Edition that slices more than $2,000 off the price of entry. And speaking of the price of entry, it is now $22,115 for Volkswagen's smallest diesel sedan in the U.S. Yes, it seems Volkswagen has finally created a car for automotive journalists as well as members of the biodiesel-brewing crowd who are tired of fixing old Mercedes-Benz W123 station wagons from the 1970s, though we probably have the diesel Chevrolet Cruze to thank for the appearance of this particular model.

JCB DieselMax

Following its display at the Goodwood Festival of Speed last month, the JCB DieselMax has recently proved itself the fastest yet diesel-powered car during Speed Week at the Bonneville Salt Flats, Utah. Andy Green, who in 1997 broke the sound barrier on land in Thrust SSC, piloted DieselMax to reach a top speed of 350.09mph, increasing the existing record set in 1973 by over 100mph. Helping the JCB DieselMax achieve this is a drag coefficient of just 0.174 and two 4.4-liter four-cylinder engines, each producing 750PS.