PS is the BHP(Brake Horse power) os the vehicle

eg: 100PS@5500rpm means the vehicle delivers 100bhp of max power when the engine runs at 5500rpm(revolutions per minute)

PS and BHP are unit of power

NM or KGM are units of torque

130NM@2000rpm means the vehicle delivers max torque of 130 NM(Newton meter) at 2000 rpm

130NM can also be written as 13Kgm(Kilogram meter)

AND..... PS stands for "Pferde Starke" which is a german word and means Horse Power.

Engines do not have peak power available to you ALL the time. Power and torque peak at different RPMs. Some cars feel sluggish because they have lower torque and/or power at lower RPMs, but the same cars may be great performers at getting from a high speed to an even higher one. This is especially true of most indirect injection diesels.

When a manufacturer claims that they have a 100hp (or ps) engine, they have to specify at what RPM they managed to measure that power.

Which is more

Power (PS@rpm)	67@5500	65@6200
Torque (Nm@rpm)	99@2800	84@3500