said Jens Neumann, head of strategy and North American operations for Volkswagen.
About 40 percent of the VW cars sold in Europe use a diesel technology called turbo direct injection, which Neumann
says is cleaner and more fuel-efficient than traditional diesel engines.
It also offers better driving performance than comparable gasoline engines, which may come as a revelation to many Americans, who think of diesel cars as noisy, smoky machines with all the agility of tractors.
European auto executives do not dispute the long-term potential of hydrogen as a replacement for gasoline.
But they are skeptical of the sudden halo of publicity surrounding what they view as a science project.Some executives suggest Detroit is seizing on hydrogen to avoid the most obvious way to make its vehicles more fuel-efficient and environmentally friendly: build them smaller.