I had a 2.5L gas engine in my westfalia , and it felt so underpowered that I switched to a modified TDI engine .....
Some said that I was too speedy lolllllllllll....maybe but that`s the way I am !
personnaly a 2.5L @ 115 hp is way underpowered ....
it is feasible to transfer a VR6 in it ....... but it`s gonna cost !
It`s your decision .....
If you think the Rialta is worth the expense ,
or keep it this way and relax !!!!
Dan