comparison with US rounds, straight on penetration at 2 km
m289a1 (end of Cold war), according to Steven J. Zaloga, penetrated 570mm at 2km. According to Fprado website it could penetrate 610mm.
a2 variant, entered in 1994, pentrated 730mm at 2km, according to fprado.
a3 variant, in service since 2003, penetrated 760mm at 2km, according to fprado
a4 variant got the contract for full scale production in 2016. penetration estimate unavailable.
Would be interesting to know what caused the jump from 600ish to 730mm, between a1 and 2 variants. Allegedly the round leaves the bareel at 100 m/s higher speed than a1 variant. But could that really be enough to explain the jump in performance?
Of course, all these may just be unbased guesstimates by all the said sources.