Land Rover has slimmed down its Range Rover and Range Rover Sport SUVs in recent years by up to 700 and 800 pounds, respectively, by switching to lightweight aluminum in an effort to improve fuel economy. The weight reduction didn't equate to a big jump in EPA ratings (just 1 to 2 mpg between comparable engines), but the luxury SUV-maker takes another step toward boosting the Range Rover and Range Rover Sport's fuel economy with the introduction of a diesel engine for 2016 at the North American International Auto Show in Detroit.
Related: More 2015 Detroit Auto Show News
The newly optional turbocharged 3.0-liter diesel V-6 in the 2016 Range Rover HSE and Range Rover Sport HSE delivers a 32 percent increase in fuel economy compared with Land Rover's supercharged 3.0-liter gasoline V-6. Land Rover estimates fuel economy at 22/28/25 mpg city/highway/combined, though EPA ratings are pending; the supercharged gasoline V-6 is rated at 19 mpg combined in both SUVs. With the diesel engine, the two become the Range Rover HSE Td6 and Range Rover Sport HSE Td6.