If the FM is true to life the La-5 of the Stalingrad period will be a sore disappointment for the red pilots, they will all go for the Yaks! Do not take the old IL-2 FM as base of any kind of serious rating of the aircraft, you have to keep in mind that the La-5/7 family in IL-2 1946 was generally a good 20kmh too fast at altitude as they were modelled after the prototype "etalon" models which were of course far better performers than the actual machines that left the factories!
The La-5 version present at Stalingrad was the very first serial produced model without bubble canopy and the initial M-82 engine (no F or FN yet).
Performance figures for the early razorback La-5 are:
Takeoff weight: ~3350kg
maxspeed at 0m: 525kmh
maxspeed at 2000m (1st charger gear): 560kmh
maxspeed at 6250m (2nd charger gear): 585kmh
Soviet turn time tests performed at constant height and speed are as high as 25s for a full turn just to put it into perspective!
For the La-5F with M-82F engine which however only arrived at front line units from spring-43 onwards:
Takeoff weight: ~3290kg
maxspeed at 0m: 550kmh
maxspeed at 2000m (1st charger gear): 585kmh
maxspeed at 6250m (2nd charger gear): 600kmh
Lets compare the 109F-4 & G-2, shall we?
Takeoff weight: 2890kg
maxspeed at 0m: 520kmh
maxspeed at 6000m: 635kmh
Turn time for this model should be in the higher 19 - low 20s region
1.42ata which was used from mid-42 onwards on the DB601E of the late 109F series would provide an extra 15kmh at all altitudes!
Takeoff weight: 3030kg
maxspeed at 0m: 535kmh
maxspeed at 6700m: 660kmh
This model is commonly quoted with a 20.0-20.5s turn time (from soviet sources)
No 1.42ata for the DB605A at the time because of engine related problems, it wasnt until late-43 that the full 1.42ata boost was cleared to use!
I guess it is fairly easy to guess from these figures who is going to come out on top of this matchup
The La-5 is nothing but a dog and even the 5F is not the uber fighter that it has been depicted as in IL-2 1946. It is slightly faster than the 109G at altitudes lower than 2000m but climbs worse and is also decidedly slower from 3000m onwards!