Audi TT 225bhp not as powerful?

[CC02YEA]

Hiya, my other half has recently had a 2003 Audi TT Quattro 225 given to him. Its a 1.8 petrol and its been remapped. However, it's been stops for 4 years and has not as much power as you'd expect from 225bhp alone, never mind the rest. Could it need a turbo cleanse or any ideas? Thanks

[Magnet]

Hello Corey,

Is it still running with the remains of 4 year old fuel in it? 
Kind regards,

Gareth. 

[Steve Q]

I agree with Gareth. Gone off fuel won't help it's running. An oil change is advisable too. 

Best way to determine its power is by Dyno it on a rolling road.