The NEW BMW X5 2010 xDrive30i comes with a 3.0-liter in-line six-cylinder engine that makes 260 horsepower, while the xDrive48i comes with a 4.8-liter V8 that makes 350 horsepower. The xDrive35d comes with a 3.0-liter 265-horsepower six-cylinder Advanced Diesel twin-turbocharged engine. All engines are paired with a six-speed automatic transmission with manual mode. Test drivers find that both gasoline engines offer impressive power, though a few aren't as impressed with the diesel's acceleration.
The EPA rates the 2010 X5 30i base model at 15/21 mpg city/highway, while the 48i V8 model achieves 14/19 mpg. These figures are unimpressive and on the average to low side for their class. However, the diesel model substantially increases fuel economy by achieving 19/26 mpg, making it one of the more fuel-efficient SUVs in the class.
For even better fuel economy without shelling out for a diesel model, consider the Lexus RX 350. It will save you a whopping $10,000 or more compared to the cost of the X5 and boasts an 18/25 mpg rating.
