I think I read somewhere that the Volvo engines are a modular design i.e. the 4,5, and 6 cylinder engines all share the same bore & stroke and combustion chamber design. With the engine mounted as it is, the engine bay would have to be one full cylinder width more to get a 6 cylinder into the V70.<P>Oh, but I wish they had worked that out. That is the one thing about the V70 that I find almost barbaric, is the coarsness of the 5 cylinder engine.<P>But strange as it may seem, GM has a new family of engines coming along that include an inline 5 cylinder, and Ford is working in that direction also. Does anyone happen to know if DB and Audi still produce their inline 5's for use in Europe?