Hi, we are newbies looking to purchase our first motorhome. We have decided the Compass Avantgarde 400 RL is maybe our way forward but we're unsure which way to go with the engine size. Is the 2L more economical or does it struggle, is the 2.8L much different in fuel consumption. Would love to hear of some "real life" mpg for each size engine and your comments regarding engine size. Many thanks.