Howdy,
A properly tuned TD5 Defender will smash any TDi. No question.
Look at TD5Alive and TD5Inside. There quite a few options in tuning the Defender. Lots on the forum about tunes.
The TD5 engine is very easy to safely get additional power from.
I run a TD5Inside tune and straight through 2.5" exhaust. Makes it far more pleasant to drive.
Cheers,
Michael

