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VW to unveil diesel-electric Twin-Up! in Tokyo

We've received multiple reports that Volkswagen will be bringing a diesel-electric concept to the 2013 Tokyo Motor Show, set to take place later this month. The car, called the Twin-Up!, is based on the Up! city car, with some sources claiming this is a thinly veiled concept that will eventually enter production.
According to Automotive News Europe, the Twin-Up! will reportedly return 214 miles per gallon on the US cycle by combining an 800-cc, two-cylinder diesel and an electric motor. It will also boast plug-in capabilities, and will be able to cover 30 miles on electric power alone.
Autocar has a more complete picture of the Twin-Up!'s powertrain, though, claiming it's a modified version of the hybrid system found in the Volkswagen XL1. The Twin-Up! will get a more potent, 47-horsepower electric motor to the XL1's 27-hp unit, but will retain that car's 47-hp turbodiesel. The battery pack will also grow, from 5.5 kilowatt hours to 8.6 kWh. Both of these increases are necessary due to the increased weight of the Twin-Up! - it's some 900 pounds heavier than an XL1.

Volkswagen's 261-mpg hand-built XL1 headed for Geneva

After years of rumors, development and testing, the Volkswagen XL1 is finally about to become a reality. The project that began life as a daring 1-Liter concept car in 2002, will finally get its production-ready curtain call at the Geneva Motor Show in just a few weeks.
As soon as it hits the streets, the two-seat XL1 will instantly become the most fuel-efficient and most aerodynamic production car in the world. The car uses a plug-in hybrid system to achieve mind-blowing consumption of just 0.9 liters of diesel fuel consumed every 100 kilometers (and average of roughly 261 miles per gallon). Plus, the XL1 can go up to 50 kilometers on its battery power alone. Coefficient of drag is a miniscule 0.189, thanks to a tiny frontal area and an obviously slippery shape.
XL1 power comes from a two-cylinder diesel motor connected to a seven-speed dual-clutch gearbox, while the 20 kW electric motor is fed by a lithium-ion battery. Both combine to give the XL1 performance figures that are, while not stirring, not shabby considering its extreme frugality: 0-62 miles per hour comes up in 12.7 seconds and top speed is nearly 146 mph.

Bentley considering diesel engine for new SUV

Turns out, in case you didn't know, the rich are just like regular people. They too are concerned about the environment, even when tooling around town in their super-luxurious Bentleys. So the automaker is weighing the idea of offering a diesel engine in its SUV offering, which could help satisfy customers' demands for more fuel-efficient engines.
Chairman and CEO Wolfgang Schreiber told Autoblog in a roundtable interview at the Geneva Auto Show that the automaker is researching whether or not a diesel engine makes sense for the brand. Bentley, owned by the Volkswagen Group, could in theory use a diesel engine from anywhere in the Volkswagen Group family. We at Autoblog have hopes they'll revive the V10 TDI used in the VW Touareg until 2010, but ever-stricter emissions laws would likely make that problematic.
But rich people aren't so much like us that they'll be worried about petty things like pricing. Schreiber admitted the diesel engine could be a $15,000 option, which he said customers would probably find "acceptable." Given that the cheapest Bentley today starts at $177,000, typical customers probably won't be diddling around worrying about an extra 15 grand.