The AAB (2.4l engine) is an in-line 5 cylinder normally-aspirated engine... according to Wikipedia the stats are:
2.4 D AAB Straight-5 SOHC 10V 2.370 cm³ 78 PS (77 hp/57 kW) at 3700 rpm 164 N·m (121 lb·ft) at 1800 rpm 1990-1998
I believe the bore and stroke are the same as the AAZ, but no turbo so it's a bit of a dog, particularly in a heavy chassis like the T4.
Giles can work his magic on the pump, though... ;-)