Fuel Consumption and BHP

Fellbound

This query is to some extent academic and posed just out of interest.  I have a new MH arriving next week. It's got a Peugeot 2.2 engine with 150 BHP.

I know many new MHs have 130 BHP 2.2 engines.  I have very little technical knowledge and was wondering what impact the higher BHP would have on diesel consumption. I've assumed it would be lower but wondered if the higher BHP might mean that that there will be less changing down through the gears and this could be beneficial on fuel consumption.  As you can possibly see from that comment I am probably a bit clueless about these things!