some one told me that he has got a 1995 wrx sti 2.0 turbo. he also said that it has 280bhp standard. can this be true? if not how much bhp is it?

I would believe that is true. This is a Version 3. The version 2, it says it has 260PS.

Type WRX
Vehicles form E-GC8
Dimensions & Weight
Length / Width / Height (mm) 4,340/1,690/1,405
IndoorsizeLength/Width/Height (mm) 1,820/1,385/1,170
Wheel base (mm) 2,520
Track (Fr / Rr) 1,470/1,460
Minimum Ground Clearance (mm) 155
Weight (kg) 1,250 (1,190)
Engine
Engine Form EJ20
Engine Type turbocharged horizontally opposed 4-cylinder dohc
Displacement (cc) 1,994
Horsepower (PS/rpm) 280/6500
Torque (kgm/rpm) 33.5/4000
Fuel capacity (liter) 60
Transmission 5MT
Brakes (Fr / Rr) V-Discs / V-Discs
Tyres (Fr / Rr) 205/50R16