I'm new to this forum however not really new to the simmer scene

I conducted all tests in the same environment at the same weight of 1000 kgs and with the same powersettings.
First of all the 4 A/C show a somewhat different initial setup. I did all setups after loading a default Cessna 172 with standard default switchings. I only mentioned the settings that seem wrong or unlogical to me.
The findings:
91B SAF46:
- gyros do not correspond to the MAG compass -> L 310°, R 314°, MAG 330°
- strange FREQ changeover button on COM equipment (valid for all KING COM)
- inconsistent acting on left and right mouse button for SGN lights and LDG lights
- after 1 roll or looping gyros start spinning and are not stoppable by any means
91C SE-KVZ:
- gyro does not correspond to the MAG compass -> 305°, MAG 330°
- DC OFF, thus no power on basic engine instruments and fuel indication
- BCN OFF
- after 1 roll or looping gyro starts spinning and is not stoppable by any means
- strange behaviour of RPM. Initially on T/O only reaches approx. 2300 RPM, inflight after some dive it increases to 2550 RPM without touching RPM lever. According to the sound pitch (which is a power indication on FSX still....) max. power is reached at 1900 RPM !!
- no reaction on CARB HEAT ON, gauge just reads ambient temperature
91D HB-DBL:
- alternator switch OFF, (however ALTN field ON) no PWR on basic engine instruments and fuel indication
no other anomalies found
91D SF3:
- CARB HEAT ON
- BCN OFF
- FLUX valve OFF
- Gyro sync OFF
- Attitude Indicator is reversed!
- same behaviour on RPM found as on 91C SE-KVZ
- no reaction on CARB HEAT ON, gauge just reads ambient temperature
Climb and cruise performance:
- Initial climb at full throttle, speed 150 km/h/80 KTS IAS
- cruise at 1500 m/5000 ft at 60 cm/24 in. MP, RPM 2300 for B and C models, 2400 RPM for D models.
91B:
climb -> 150 km/h IAS, 11 m/s
cruise -> 255 km/h IAS
91C:
climb -> 150 km/h IAS, 7 m/s
cruise -> 198 km/h IAS
91D HB-DBL:
climb -> 80 KIAS, 1600 FPM (8 m/s)
cruise -> 119 KIAS (220 km/h IAS)
91D SF3:
climb -> 150 km/h IAS, 7 m/s
cruise -> 198 km/h IAS
It seems to me that these data are also a bit inconsistent. B + C model have the same engine but completely different performance. Both D models have the same engine and slighty different performance too. This problem with the RPM (wrong mapping..?) results in both the 91C and the 91D SF3 in lower performance at identical parameters.
Maybe someone else can confirm those results?
Oskar