While there are three different powertrains on offer in the 2014 Audi Q7, we maintain that one stands well above the others—especially if you value fuel economy numbers. No large crossover is going to win a green-car gold medal, but among the three choices, the diesel is the clear winner.
We have nothing against the base 3.0-liter supercharged V-6, making 280 horsepower, and the S line's more sharply-tuned 333-hp version. It's just that the 3.0-liter turbocharged diesel V-6, which was recently reengineered this year, is just about as much fun. Even if you go by the official 0-60 mph numbers (7.7 seconds to 60 mph), it's just as fast as the base engine, while being considerably skimpier on fuel during highway trips. And compared to either of the gasoline engines, it makes towing look effortless.
Those gasoline versions rate 16 mpg city and 22 mpg highway, while the TDI diesel scores a more impressive 19 mpg city and 28 mpg highway.