Join Date: Jan 2008
Location: Tunbridge Wells
Is the engine warning light on on the dash board? When accelerating, is there a loud whoosing/hissing noise that gets louder the harder you accelerate?
If so, it could be a holed turbo hose. My GT suffered lack of power when it developed a hole in the rubber hose that connects the turbo, which sits underneath the car. Eventually, when trying to get it up to motorway speeds, the engine light would come on and the car would go into 'limp home' mode, which meant that I could get above 50 mph no matter how hard I pressed down the accelerator. Relatively easy fix though, which is to replace the hose assuming this is the problem with your car.
Alfa Romeo GT Cloverleaf Q2 170bhp
Alfa Romeo 159 Sportwagon TI Q4 210bhp