We all know about its infamous engine that had reliability issues in the beginning. These where mostly ironed out by the Mk.5 variant that was fitted with the Leyland L60 4Mk.7A. With later Chieftains receiving the same engine and further upgrades on them.
In game the Mk10 chieftain has an unnamed engine developing 760 HP at 2550 RPM these are not the correct values for the variant of engine. It should have the L60 Mk.11a and developed 840 HP.
Mk.3 gets the Mk.6a making 650 BHP
Mk.5 gets the Mk.7a making 720 BHP
The Vickers Vijayanta should have the Mk.4B and make 540 Hp
Vickers Mk.1 should get the Mk.4a/2 and make 650 HP
Side note Gaijin really doesn’t like Britain and makes it so difficult for any changes to be made.
Link to bug report: All Chieftains have the wrong engines Mk3/5/10 // Gaijin.net // Issues
All sources are from the Leyland Society (An independent collector of the old Leyland archive.)