It's dimensions are:
Overall body length 190.9 in
Overall body width 75.4 in
Overall body height 74.1 in
Wheelbase 113.6 in
Track, front/rear 63.2 / 63.5 in
[
LandRoverUSA: LR3 Dimensions]
while the discovery II [which is bigger than the DI]'s dimensions are
Overall body length 185.2 in. (4705 mm)
Overall body width 74.4 in. (1890 mm)
Overall body height 76.4 in. (6ft. 4.4 in/1940 mm)*
Wheelbase 100.0 in. (2540 mm)
Track, front/rear 60.6/61.4 in. (1540/1560 mm)
[
LandRoverUSA: Discovery II Dimensions]
I think it just looks small because of the chopped off rear-end