Frankfurt preview: 2015 Land Rover Range Rover Hybrid

The total weight of the hybrid system is less than 264 pounds.

Land Rover has detailed the diesel-electric hybrid variants of its all-new Range Rover Sport and its flagship Range Rover. Land Rover's first-ever regular-production hybrids will debut at the Frankfurt Motor Show next month.

Both SUVs are powered by a 3.0-liter turbodiesel V6 and a 35-kilowatt electric motor integrated into the ZF-built eight-speed automatic transmission. Using data gathered from the experimental Electric Defender, Land Rover engineers managed to lower the total weight of the hybrid system (including the water-cooled lithium-ion battery pack, the motor and the inverter) to less than 264 pounds.

Together, the two power sources generate 340 horsepower and 516 lb-ft. of torque, enough to propel the 5,277-pound Range Rover from zero to 62 mph in 6.9 seconds and on to a top speed of 135 mph. About 50 pounds lighter, the Range Rover Sport sprints to 62 mph from a stop in 6.7 seconds and reaches maximum velocity at 140 mph.

Both SUVs can run on electricity alone for one mile at speeds of up to 30 mph.

The hybrid system's compact design enables the Range Rovers to retain a full-size spare tire and boast the same cargo and passenger capacity as their non-hybrid counterparts.

To demonstrate the potential of its new diesel-electric drivetrain, Land Rover will send several hybrids on a 10,000-mile expedition from its hometown in England to parent company Tata's headquarters in India. The convoy will cross France, Belgium, Germany, Poland, Ukraine, Russia, Uzbekistan, Kyrgyzstan, China and India, marking the first time a hybrid vehicle tackles the the Silk Road that links Asia to the Mediterranean.

Both Land Rover hybrids will go on sale across Europe next month. Whether or not the eco-friendly SUVs have been earmarked for the United States market is currently up in the air.

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