I still wouldn't consider 5 common, in all fairness.
Poland don't tend to use the 8v engines unless it's a turbo apllication, but over there reliability is key due to their currency.
They prefer the 16v engines, reliability mixed with higher standard output, aswell as some tasty bragging rights.
But they know how to build a nice cento, whereas we are still learning that.
They also have alot more aftermarket businesses that specialize in modifying the fiat engines, for example a pair of race cams is only £300 and have the same profiling and materials as the C&B ones. Strongflex makes the bushes for the cars. MTS make coilover suspension. Have a much wider rang of 13 inch and 14 inch alloys than over here due to germany only being round the corner. They hold the biggest cento only event in the world.
Thanks
X