The following cars represent the most technically advanced available.
The 2014 Volkswagen Jetta TDI offers basic transportation at a bargain and an excellent engine, but techies will want to hold off for the improved 2015 model.
The 2014 Audi A7 TDI includes some of the best connected tech available today in an automobile, and those inclined to put up with a few diesel drivetrain quirks will be rewarded with significantly higher fuel economy than from the gasoline equivalent.
Despite some very minor quibbles, the 2014 BMW 535d xDrive delivers exceptional quality and feature content on all fronts, from online cabin tech to fuel economy to driving satisfaction.
With solid cabin tech, the 2014 Chevrolet Cruze Diesel competes well with compact sedans and gets stellar fuel economy, but high initial cost and the price of diesel eat into the savings.
Featuring excellent fuel economy and a generally comfortable and easy-driving character, the 2013 Mercedes-Benz GLK250 makes for a useful all-around vehicle, good for the daily commute and family road trips.
Building of a speaker design by Swedish audio engineer Stig Carlsson, Teenage Engineering's minimalist OD-11 aims to stream music directly from the cloud.
General Motors on Friday opened a new $200 million diesel engine plant in Rayong, Thailand. The plant is GM's most significant power-train investment in Southeast Asia to date.
With diesel fuel economy and its wagon format, the 2013 Volkswagen Jetta Sportwagen TDI offers great utility, and adds a premium-car feel, but cabin electronics only cover the basics.
BMW considers which models to offer as four cylinder diesels in the U.S.
Nissan announced specifications for the gasoline engine component of its ZEOD hybrid gas-electric race car, which will compete in the 24 hours of Le Mans and FIA endurance races.