If JLR made a van with basically nothing in it, I'm sure it would be relatively reliable to the highace, especially generally speaking with how long lasting LR engines are.
Any company can build vans without showstoppers imo, they are so simple. 
Comparing Van's to JLR 4x4s is not really fair imo.
Maybe you picked a good year for your couple of vans however quick search online:
Hiace issues:
AustralianCar.Reviews: #1 for Reviews and Used Car Valuations
Here's an example from link
"Toyota HiAce with 1KD-FTV engine: injector failure
It is not uncommon for the injectors in the 1KD-FTV engine to fail around 120,000 to 140,000 kilometres, though they may fail as early as 75,000 kilometres or last 250,000 kilometres. Symptoms of a failing injector include:
    A loud 'knock' noise that is audible when the windows are down, particularly when the engine is cold;
    Poor fuel economy;
    An erratic or rough idle; and,
    Rough running, particularly under load at low engine speeds"
Toyota HiAce H200.I (2005-2010) Reviews - ProductReview.com.au
Pic from link
........
On the other hand building a well rounded on/offroad 4x4 that is comfortable, capable, safe and also reliable is something that is extremely difficult as is seen by the many potential 
showstoppers the tdv8 70series have from the factory.
The point was not to bash other brands or offend rather to point out that the reason people say Yotas are perfect and reliable and trail ready bla bla is because of their marketing saying they are tough and reliable,
 people believe it without looking at the facts.
All 4x4s need a few things tweaked as no company gets it all right, saying toyota 4x4s are more reliable is a massive stretch when you look at the facts.
Will they get the balance right on the new defender, we hope so, I reckon they will keep most people happy. 

Bookmarks