The 4RM system (as it’s called) delivers RWD driving dynamics in regular conditions, only sending power to the front wheels when slip is detected. To do this, Ferrari uses a Power Transfer Unit (PTU), that delivers torque directly from the crankshaft to each of the front wheels individually. As a result, power can be distributed individually between left and right sides on both the rear and front axle for maximum grip.
Weighing 50 percent less than a conventional AWD system, it helps keep the car’s overall curb weight down, while maintaining a weight distribution of 53/47.
Get the full explanation in the video after the jump:
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