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TL,DR: The last version of the Leopard 2’s initial production run featuring improved protection and firepower

The initial production of Leopard 2s for the Bundeswehr was carried out in 8 batches (“Baulose” in German). Throughout this production cycle the Leopard had been steadily improved. Starting in January of 1991 the 8th and final batch started at KMW and ended on March 19th 1992 with a total of 75 brand new tanks joining the Panzerbataillons of the Bundeswehr.
Specifications
Combat weight:
56,5 tons
Protection:
“C-technology” composite armor package for hull and turret, “D-technology” heavy and light side skirts
Armament:
120mm Rheinmetall L44 (42 rounds), 2x MG3A1 7,62mm machine guns (6600 rounds), 16x smoke / anti infantry grenade launchers
Mobility:
MTU MB 873 Ka-501 12-cylinder Diesel producing 1500 hp @2600rpm
Optics:
EMES 15 main gun sight with WBG-X thermal sight for the gunner / stabilized PERI R17 independent commanders sight with NVD
Protection
From the 97th vehicle onwards in the 6th batch the Leopard 2A4 was equipped with a new and improved composite armor package that greatly enhanced protection against both kinetic and chemical energy threats. The hull armor is identical to the later 2A5 and 2A6 versions many players are already familiar with while the turret front also gained a significant boost in protection that allows it to effectively stop many of the APFSDS projectiles found at and even above its rank and battle rating.
To improve the protection of the frontal arc the Leopard received new sideskirts that now also covered the upper hull. These parts are easily recogniseable by their flat underside once again being identical to those found on the Leopard 2A5 etc.


Estimated protection against KE projectiles (credit to @SPANISH_AVENGER)
Firepower
This Leopard 2A4 retains the well known L44 cannon, but features the DM33A1 which was introduced into service in 1987.
This round allows it to engage enemies with more confidence since it not only allows the a more reliable penetration of some lower tier opponents (e.g. T-64B) but also has an easier time against weakspots that might have required a very precise shot or were impenetrable with DM23.
Mobility
There is not much to be said here, the Leopard 2A4 (1991) retains the great mobility of the early 2A4. Top speed and reverse speed remain identical at 68 kph / 32 kph.
Placement in the game
Germany only has a single tech tree tank at 10.7 and then a gap until 12.7.
In game this tank could be placed at 11.0 with DM33 or 11.3 with DM43 to fill said gap and support the Puma VJTF which currently has no lineup and is not strong enough to warrant uptiering the 2A4.
Pictures:
“Leopard 2 - sein Werden und Seine Leistung” - Paul-Werner Krapke
“Leopard 2 in der Bundeswehr” - Frank Lobitz


