Another day, another early unveiling prior to the 2014 Detroit Auto Show, this time from Volkswagen AG with their 42-mpg Passat BlueMotion Concept.
The magic behind the concept’s fuel economy lies within its turbocharged 1.4-liter gasoline four-pot; at city speeds, the engine deactivates two cylinders to boost economy, a feature already found in the automaker’s Polo and Golf sold in Europe. Other fuel-saving methods include a stop-start system, and a coasting function that decouples the engine from the transmission when the driver lifts off the accelerator; the latter is already available in the Jetta Hybrid.
The above setup — which Volkswagen aims to evaluate for the U.S. market — improves upon the current base Passat’s 34 mpg highway from its 1.8-liter turbocharged power plant, though horsepower drops from 170 to 150. The Jetta may also receive a similar package in order to improve upon its 32 mpg highway rating in an effort to catch up to more efficient offerings from Honda, Hyundai and Mazda.