2008 tiffin motorhomes allegro bus 42qrp 2008 tiffin allegro bus 42qrp 42' class a motorhome. cummins 425hp diesel engine. 4 slide outs 2 awnings sleeps 6 triple a/c units leveling system. imagine driving off to all of your favorite destinations in this tiffin allegro bus class a coach. model 42qrp offers quadruple slide outs for extra interior space plus so much more! step inside and take a look back at all of the convenient features that would make any journey enjoyable. the kitchen area features everything you need to prepare great meals on the go including a sink a three burner....