The Strv 104 were the last serving Centurion in the Swedish Army, in 1983-1987 where 80 of the oldest Strv 102 were to go through another renovation that were in dire need of modernization to extend their service. Strv 104 were upgraded with a new diesel engine and gearbox which would greatly improve the maneuverability of the vehicle. Along with that came many features inspired by an American-Israeli modified hull, which were designated Panturion, that proved to be superior to the British modifications. All 80 selected Strv 102 would go through the renovation assigned to Hägglunds & Söner AB in Örnsköldsvik. These improvements were worth-while for the Swedish Army, the new improvements increased the efficency of maintenance, making it easier to maintain the tanks in the field. These changes extended the service life but they would be phased out for the Strv 121 in the mid 1990's, all the remaining Strv 104 were then redeployed to Gotland where they would serve till late 90's early 2000.

It was introduced in Update "Raining Fire" to improve the line up for the small Swedish tech-tree, Strv 104 have a similar playstyle to the Centurion's but are more familiar to the Israeli Sho't. An improved vehicles equipped with ERA bricks giving it an improved protection against HEAT ammunition mainly, but also improved engine giving it a greater maneuverability around the terrain on the different maps. Strv 104 also comes with the improved APFSDS Slpprj m/80 giving it a greater penetration at range compared to the older APDS Slpprj m/66 improving its lethality against well armoured vehicles and gives it the ability to engage hostiles at further range where the Strv 104's armour have a better chance to be efficent, But can still easily be knocked out by vehicles T-72A, AMX-32 or Merkava's.