Late XUD or Early HDi 406?

Question

Hi,Having decided to finally pension off my much loved '92 405 diesel estate I am currently deciding what kind of 406 to replace it with.Given my budget, it looks that I'll be looking in the years 97-99, so my question is this: Should I buy a late XUD or an early HDi? Bearing in mind I do absolutely everything that needs to be done to my 405 myself, and would like to keep things that way as much as possible.As I see it now the advantages of each would be:XUD: Cheaper to buy, presumably much easier for the home mechanic, proven technology (compared to HDi at the time).HDi: Better fuel economy, more power.Also specifically, I have heard that a few of the late XUDs have a possible fault that can cause catastrophic con-rod failure. And, in reality, how often do HDi electronica (i.e. the bits I can't fix) actually fail?Many thanks for anyone's help on this.Jon Symonds

G.T · Accepted Answer

Hi,True.Some people used both XUD9TE and DW10T (so the 90HP version) and found theXUD more powerful. The HDi has a better torque at low revs, though.No idea, electronics on HDi's seem to be reliable.Regards,G.T    205 Diesel & turbo-Diesel :

Wichita · Answer

As the owner of another '92 405 TD estate, I implore people to respond!Though with only 89,000 miles on mine ... I wonder if it may yet see me out!PS> How much do you want for yours?Cheers

Nik&Andy · Answer

I have a 406 2.1TD with 110Hp.It's no rocket, but at 143,000 miles, it's proving fairly reliable.sounds like a tractor and suffers amazingly long turbo lag...I had to upgrade the speaker system to hear them over the 12v engine!I have heard lots of people complain about HDI's, but taxi drivers and mini-cabers seem the love them and they do more mpg, this has to be good.Andy

Buccaneer · Answer

I have had both and the drive of the HDI is far superior (mine is the

110). There is also the advantage that there seems to be no lag before the turbo cuts in. Mine is just approaching 100K miles and runs extremely well. The only downside I am aware of (from personal experience and other posts) is that there is a problem that occurs with the fuel lift pump in the tank, It wears and eventually starts to break up, contaminating the fuel system with metal particles. It is important, therefore, to regularly inspect the fuel filter to catch any problem before the particles break through.

MarkK · Answer

Having just bought a 110bhp 406 HDi built in 2001, I'd be interested inwhether my car is likely to be affected by this issue, or is it just earliercars?

Buccaneer · Answer

To the best of my knowledge it applies to all HDI's but hopefully some of the gents who actually work on the cars will be able to confirm or refute this. Certainly I have heard people on a consumer program who had this problem and there have been a number of other posts on this site in the past (do a search in Google Groups to find them). Peugeot's answer is to replace the entire system from tank to injectors (my dealer quoted £3,500) but fortunately the particles had not punctured the filter when mine was found so a local mechanic was able to replace the pump and flush everything out. Even then it cost £850 but the car is still perfectly fine a year later.

Late XUD or Early HDi 406?

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