Designed to be lightweight and cheap to produce, the robotic bicep upgrade uses a (mostly) aluminum frame, battery-powered DC motor, cable drive system, racket braking and thumbstick controller for movement, with a BeagleBone board supervising the electronics that pull it all together.

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In addition to the petrol engine and electric motor, the LF-CC hybrid drive system further comprises a generator, a high-performance battery, a power split device which, via planetary reduction gears, combines and re-allocates power from the engine, electric motor and generator according to operational requirements, and a compact power control unit to govern the high speed interaction of the system components.

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Its no-contact drive system uses an advanced low-noise motor and geared belt to ensure control over speed while filtering out vibration.

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Once at the motor sports complex, journalists took turns testing all-wheel-drive XJs and smaller XFs, which also get the system as an option for 2013, by flinging them through various obstacle courses, every one of which was covered in several inches of snow with thick ice underneath.

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