
The 1.5 in my current Alfasud is a delightful engine, and it's 103 bhp is more than enough for a lively drive in the light body. The later 16V 1.7l iterations of the Alfa boxer ran to 135 bhp (@ 6,500 rpm) and 119 lb-ft (@ 4,600 rpm), which both compare favourably to my 1.9DG (78 bhp @ ~4,500, 104 lb-ft @ 2,600). The big difference is the high-revving nature of the Alfa engines - those maximum figures need a lot more revs than the DG, a characteristic that may not suit the relaxed driving style of a camper. I have no idea whether the gearboxes would cope with the extra weight of the T25, and of course the Alfas were all front-engined FWD so the gearbox might be an unsurmountable problem.
Just curious whether it's ever been done, that's all.