Between berlinas

THE VYII had the old Buick-derived 3.8-litre ECOTEC overhead-valve V6, which dated back to the VN Commodore. It was a pretty tough old nail, with good torque characteristics and good fuel economy. The VZ has the new 3.6-litre quad-cam Alloytec V6, which has more power and torque than the ECOTEC engine, but I don't think its torque characteristics are as good. It's also a little thirstier than the older engine. I don't see a lot between the resale values of the two, but being newer the VZ will command a higher used price for the foreseeable future.