Different engine compartment in order to fit the new MB 873 Ka-500 engine (1500 hp) and its HSWL 354 transmission, type 570 tracks instead of the type 635.
I have a table listing the performance of a dozen of APFSDS ammunition against NATO targets at given ranges.
I'll post it later.
Two Keiler prototypes were produced from october 1969 and were trialed in 1970 :
A total of sixteen Leopard 2K prototypes were produced and tested between 1972 and 1975, seven of them were fitted with a 120 mm smoothbore gun :
I would add that this is family of five 105 mm rifled guns, with designations ranging from Rh 105-11 to Rh 105-60.
It was armed with a 105 mm smoothbore gun and it was powered by the MB 872 Ka-500 engine developping up to 1250 horsepower, the Keiler weighed likely as much as the Leopard 2K prototypes ; between 46 800 kg and 50 500 kg.
French APFSDS :
Left to right, second row : OFL 120 F2, BSCC 120 F1, 140 mm APFSDS, OFL 105 F2, OFL 105 F1 or G2, OFL 90 F1, OFL 90 F2, OCC 90 62
Left to right, front row : OFL 120 F1, OECC 120 F1, two non-identified arrows