Having four wheel disc brakes doesn't means that the car has an ABS and having an ABS doesn't means that the car is equipped with four wheel disc brakes,There are so many JDM vehicles having ABS with front disc and rear drum brakes,and 6th Gen Honda Civic Vti (1998~2001) 07 Gen Honda Civic EXi (2004~2006 Eagle eye) have 04 wheel disc brakes without ABS.Let me clear on more thing ABS not only engages itself at high speeds but even at lesser speed only when the wheels get lock either by emergency braking or getting skid at water or mud.