Just some minor errors in stats that I've found. Possibly more to come.
FS ETR.300 Settebello - 200km/h
CD 814 - Buy menu capacity does not match actual capacity; capacity is correct but buy menu says it is more.
SJ X2000 - give the heads 21 passengers each to reflect the fact that one end is powered and one end is a wagon - currently the driving trailer has no capacity.
NSWGR Silver City Comet - give the heads 23 passengers each, same reason as above.
The following are estimates where actual horsepower figures are not available. These are increased from the current values to improve usefulness and gameplay balance but remain perfectly plausible for the model of locomotive.
NSWGR Z25 - 650hp
Canadian Pacific 374 - 670hp
Prussian S3 - 580hp
PRR D16 - 1090hp
China Railways H - 720hp
JNR 7100 - 200hp
East African Railways 31 - 1220hp
South West African 2-8-0 - 640hp
RZD U - 820hp