The v is larger and 230lbs heavier, so the mileage cannot be identical to a regular Prius, but the cut in mpg is pretty severe. It is only 1 mpg higher than the 2012 Camry Hybrid which has a much more powerful engine. I feel like the v may be under-powered and the small engine could be struggling with the extra weight vs the standard Prius resulting in lower MPG. If you just want a roomier interior for passengers and a quieter ride than a Prius offers and don't need the cargo room for bulky items, I think the Camry Hybrid will be a more enjoyable vehicle to drive and ride in than the Prius v for only 1 MPG penalty. It wouldn't surprise me if the current engine is a stop gap until a more powerful and more efficient engine comes out for the v (maybe put Camry Hybrid engine in if not an all-new engine).