1.9 jtd 8v engine ??

[robdubu]

Hello people !!

Im looking to find some info out on the 1.9 jtd 8v engine,
im actually on about the engine in the alfa 147 but i know you have it in some of your fiats too,

one thing that puts me off about this engine is that its only got 8 valves, does this affect the preformance much ?

im pretty sure it has 115 bhp ? whith a few mods and remap what bhp am i looking at ?

How would this engine compare to the 1.9 tdi vag engine ?

many thanks, rob

 

[JTD_Liam]

Got this engine in my Stilo. The 8valves don't seem to hamper the engine, i've not driven a Multijet 16v but the 8v still moves at a decent pace.

Re-maps can be done though i personally think theyre asking for trouble unless you take obsessive care of the car, therefore I dunno exactly how much more power they can add to this engine.

Compared to a VW 1.9 TDI (PD) engine, the 8v JTD is a similar noise level at idle, but feels less agricultural once youre up to 40mph or more. It also delivers the power over alot wider range, so it's easier to drive. The VW engine needs to be rowed through the gears with it's old school narrow powerband by comparison.

 

[robdubu]

Thanks for the info mate ! boosts my confidence on the engine being good

 

[s130]

Performance differences asside the only service difference between 8V and 16V JTD/Multijet engines is that the 16V engines have hydraulic tappets that self adjust.

To my knowledge the 8V engine still uses shims for valve adjustment. This is not a big issue as the shim setup is very reliable and unless there is ongoing valve recession/wear then once set they will very rarely require adjusting.

 

[robdubu]

Performance differences asside the only service difference between 8V and 16V JTD/Multijet engines is that the 16V engines have hydraulic tappets that self adjust.

To my knowledge the 8V engine still uses shims for valve adjustment. This is not a big issue as the shim setup is very reliable and unless there is ongoing valve recession/wear then once set they will very rarely require adjusting.

Is there any advantages or disadvantages for them being non hydraulic ?
are they easy to adjust ? pretty sure ive done it on an old fiesta at college lol.

 

[sludgeguts]

upside of hydraulics is that everything adjusts automatically.
Downside is if you get a car/engine that hasn't been properly looked after.
I had one motor where the cam belt tensioner was hydraulic, previous owner hadn't bothered much about changing oil so oilways gummed up.
70mph down the A1 and the cambelt jumped a couple of notches due to being slack - whole new lump needed.
Another car had overhead cam & an oilway became blocked/clogged so no oil to the shells. This one only needed a new top end.
Always worth changing the oil at specified intervals even if you feel it doesn't need it & always worth changing the oil more frequently for higher mileage or if you like to race the engine.