Quite a few of the manufacturers are using the Peuguot/Citroen 3 cylinder 1 litre Turbo petrol engine. They come in 3 states of tune 99BHP 130 BHP and 155 BHP.
They power most of the PSA group engines, Cirtoen Peuguot,and the big SUV’s 2008, 3008, 5008 C5 Aircross, Mercedes A-class petrol use these engines. There are other manufacturers using these engines.
So if you get a car that is 1 litre 3 cylinder and comes in 99, 130 and 155 bhp – you know its a Pug engine.
That is why the engine size is not as important as power output.