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GM unveils electric Cadillac Converj concept at the Detroit auto show

General Motors pulled perhaps a surprise at the Detroit Auto Show Sunday morning, unveiling an eye-catching two-door Cadillac concept powered by a "future evolution" of the Chevrolet Volt's electric powertrain. Called the Converj, the Cadillac will have a range of 40 miles on electricity, with a potential total range of 700 miles after a generator kicks in. GM says the powertrain, formerly known as E-Flex, is now called Voltec, and could be used in a variety of applications.

Ford's 1.0-liter EcoBoost wins engine of the year

Ford's 1.0-liter EcoBoost engine was named the 2013 International Engine of the Year on Wednesday, marking the second consecutive year it has done so. The engine also took home the highest score in the history of the awards, along with a “Best Engine Under 1.0-liters” category. The tiny engine packs a respectable punch for its size, producing 123 hp and 148 lb-ft or torque (Specs may be different pending specific model the engine is in).

Winners and Losers: Porsche sales pop in April

Porsche sales spiked 82 percent in April and are up 46 percent for the year, parking the luxury automaker among the top five winners so far for 2011. The redesigned Cayenne made the biggest contribution, with sales up an eye-popping 384 percent from last April and 141 percent for this year. Porsche counted 1,578 copies of the Cayenne sold in April, versus 326 the year before.