EU5 and EU6 engines

Searched but could not find my answer.

I am still considering and Octavia Scout but then thought about a Superb 4x4 and then thought why not just get another Yeti.  

I see various diesel engines on here and different power outputs and even different CO2 emissions for the same engine on a different model.  That got me wondering about which engines are EU5 or EU6.   Can anyone help me fill in the following EU number for the following models and BHP's:

Yeti 4x4

150 = EU6 [my wife has one of these]

138 = 

170 = 

Octavia Scout 4x4

181 = EU6

184 = 

Superb estate 4x4

190 =

170 = 

Thanks