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Range Rover, Range Rover Sport Diesel Models to Debut in Detroit

Motor Trend logo Motor Trend 1/11/2015 Jason Udy

In order to boost the fuel economy of a couple of its luxury SUVs, Land Rover is adding a pair of diesel-powered options to its lineup. The British SUV-maker revealed the 2016 Range Rover HSE Td6 and 2016 Range Rover Sport HSE Td6 at the 2015 Detroit auto show this week.

The new Td6 models will be powered by a 3.0-liter Td6 turbodiesel V-6 making 254 hp and 440 lb-ft of torque at just 1750 rpm. In comparison, the gasoline 3.0-liter supercharged V-6 makes 340 hp and 332 lb-ft at 3500 rpm, while the gasoline 5.0-liter supercharged V-8 makes 510 hp and 461 lb-ft at 2500 rpm. Like the gas engines, the new Td6 engine is backed by a ZF eight-speed automatic transmission.

Estimated fuel economy for the new diesel-powered rigs is expected to be 22/28/25 mpg city/highway/combined -- a 32-percent improvement over the supercharged V-6 engine’s 19-mpg combined rating. The gasoline V-6 is EPA-rated 17/23/19 mpg in the Range Rover Sport and 17/22/19 mpg in the Range Rover. Land Rover says the Td6 increases overall range to 658 miles: gains of 8 percent for the Ranger Rover Sport and 3.3 percent for the Range Rover.

2016 Land Rover Range Rover HSE Td6 badge© Provided by MotorTrend 2016 Land Rover Range Rover HSE Td6 badge Land Rover claims the diesel-powered 2016 Range Rover Sport HSE Td6 and 2016 Range Rover HSE Td6 models can reach 60 mph in 7.1 and 7.4 seconds, respectively. The automaker also says the same models with the gasoline V-6 can reach 60 mph in 6.9 seconds and 7.1-7.4 seconds, depending on wheelbase. In testing, our long-term 2014 Range Rover with the 3.0-liter supercharged V-6 reached 60 mph in 6.1 seconds. The diesel's low-end torque is ideal for towing and off-road driving, according to Land Rover.

The 3.0-liter Td6 turbodiesel V-6 is built around a Compacted Graphite Iron (CGI) engine block for high strength and low weight. The block features deep skirts, a cross-bolted design, and one-piece structural aluminum oil pump to help with refinement and low combustion noise. Land Rover updated U.S.-spec engines with a water-cooled turbocharger with ball bearings and new vanes and nozzles. The updates improve overall efficiency by 8 percent as well as durability in high-temperature environments. Other features include a two-stage oil pump to improve efficiency and a revised two-stage fuel-injection system for reduced hydrocarbon emissions and knock reduction. Dual-isolation engine mounts further add refinement.

As with most modern diesel engines, the Td6 injects Diesel Exhaust Fluid (DEF) via a Selective Catalytic Reduction (SCR) system to reduce NOx emissions to meet U.S. LEV 3 standards. Additionally, the Low Pressure EGR system recirculates exhaust air after the DPF filter and routes it back to the turbocharger inlet where it travels through the intercooler for a lower peak combustion temperature. The EGR system in turn lowers NOx emissions.

The new Td6-powered SUVs have been tested in the U.S. in the most extreme conditions and terrains from sea level to 14,000-feet elevation and from the coldest winter days in the North to the hottest summer days in the Southwest. Land Rover says the test fleet will accumulate more than 1 million miles before the SUV goes on sale in fall 2015 as 2016 model-year vehicles.

2016 Range Rover HSE Td6 and 2016 Range Rover Sport HSE Td6© Provided by MotorTrend 2016 Range Rover HSE Td6 and 2016 Range Rover Sport HSE Td6

Source: Land Rover


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