The original Avanti (Dunlop) brake system designed was
derived from cars which had a heritage of road and track
racing.   The solid disk rotor was the only design in those
days and the best performing brake pads had a
metallic-asbestos compound, not the organic sausage, we can
only get today.  Metallic pads transmitted the heat energy,
generated from hard braking,  away from the rotors, through
the pads to the  heavy steel calipers.  Once a metallic pad
gets warm from a bit of use, you CAN lock the wheels pretty
easily.   Metallic pads, on the other hand are miserably
inefficient until that point.
   The flip flop efficiency and high wear rate of the
metallic pads steered the continuing development of disk
brakes away from metallic pads for general automobile use.
  Vented disks were introduced, in concert with organic
pads, which keep the heat at the rotor and allow the rotor
vents  shed the heat.  With the total elimination of
asbestos, the efficiency of all brake friction components
diminished.
   Today, most pads are organic or ceramic compounds with a
slight trace of metal and are in no way, capable of
emulating the stopping power of the original metallic pads.
   I've always stated that the Dunlop system is superior in
design to the floating calipers used today, but the Turner
system, with the larger sized pads and rotor swept area are
probably superior for braking today's cars.