Originally Posted by Red Fox
true Biggles. By performance, I also mean ride quality and safety. I fancy taking my rib down the Tees from Stockton and into the North Sea (on a good day), and out around the south west coast of Scotland so I was keen to hear from anyone who has more knowledge than me about the difference that 0.5m in size would make to the ride. i suppose a 60hp on a 4.7 would give the same sort of speed as a a 40hp on a 4.2.
Waa Hey. I was tooling around in an 11 metre thing made bu quinquarrie (not impressed by the way() with rwin 250's in that sea in some big waves. I was doing Standby work at Sunderland and needed two take the boat for a decokeing run, I remember thinking how fantastic it would have been in my Avon 4.7 (which I foolishly sold) I think the Zodiac and Sea Rider are quite similar in Hull shape.
The difference in handling and sea keeping between a 4 and a 4.7 is surprisingly large. get a sea trial and find out for yourself the extra 20 Hp will help flatten the sea and compensate for the extra beam of the 4.7 I'd advise footstraps