I have only drove the Diahatsu powered Range Rover, I had a 2.5 non Turbo( straight in line pump) , which was slow on accelleration but would pull a house down.
I then had a 2.8 non turbo (rotory injector pump) this was faster accelleration, but no faster flat out, but would pull a house down.
Both performed well off road but are sluggish even the Turbo ones compaired to a TDI etc, in traffic or motorway.
But I never found any problem, remember these engines are cheap, is it worth the extra cash to knock a few seconds off the 0-60 time?
If I was on a budget I would fit any diesel I could get cheap, just for the reliability and economy.
Has any one fitted a 405 Diesel to a Rangie?
A few are cropping up in SJs and Suzuki in Spain factory fit them