From : https://www.tititudorancea.net/z/four_wheel_drive.htm

Comes this:
Jensen applied the Formula Ferguson full-time all-wheel drive system to 318 units of their Jensen FF built from 1966 to 1971, marking the first time 4WD was used in a production GT sports car. While most 4WD systems split torque evenly, the Jensen split torque roughly 40% front, 60% rear by gearing the front and rear at different ratios.

So, how do you use different gear ratios to drive the same size tires at the same speed at the same time, with power being transmitted to the front and rear in different quantities??

I'm SO glad that the bicycle has only 2 wheels, USUALLY having only one driven......