Audi 90 -86 USA VS europe

[ur-s4315]

I bought my self an audi 4000 s quattro to be as a daily driver. Google says that it only has 115 HP but the european modell 90 quattro has 136 HP and it should be the same 5-cyl engine.
Does anybody know what the difference is between these engines?

[stiglet]

Emmisions control most likely.

[ur-s4315]

Yes, but whats the difference in the engines to get emission down.

[stiglet]

Not sure, but i know it is emmisions related. Probably just a more restrictive cat or ECU.

[mcandmar]

Euro cars didn't have a cat, maybe thats your difference.

115hp sounds like the 2.0 5cyl fitted to the Audi 90, only the 90q got the 136hp 2.2 5cyl AFAIK

[stiglet]

yes its probably the cat, sorry my mistake about the ecu as the the kv wouldn't have one!!

I know the 20v is 10 bhp less i the USA, not sure how that works since both Euro and USA cars have a cat so i'm guessing that could be ECU related?