When two boats share the same hull type — in this case both the Ranger 170VX 2008 and the Ranger 191 Cayman 2009 are modified vee designs with fiberglass construction — the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?

On paper these two are close siblings in the size department — Ranger 170VX 2008 at 17,0 ft versus Ranger 191 Cayman 2009 at 19,0 ft. At 127 lbs and 118 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.

The power gap is worth calling out. Rated to 200 hp, the Ranger 191 Cayman 2009 has a 85-hp advantage over the Ranger 170VX 2008's 115-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Ranger 191 Cayman 2009 carries 48 gallons versus 25 gallons in the Ranger 170VX 2008. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

Both boats are rated for 5 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.