145 v 146 v 155 v 156 2.0 ts engines - Alfa Romeo Forum
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145 v 146 v 155 v 156 2.0 ts engines

are their any differences in the above engines.
 
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marlon
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Re: 145 v 146 v 155 v 156 2.0 ts engines

Yes !!!
The 155 has both 8v and 16v TS engines wheras the rest only have the 16v versions .
The earlier 156 puts out 155bhp as opposed to the 150bhp of the rest. The later 156's (can't remember from what date) are reduced to 150bhp again. I imagine the emission systems will be different (more restricted on the 156, especially the later versions).
 
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Re: 145 v 146 v 155 v 156 2.0 ts engines

I think the 146 and 156 155bhp models were around the 1999-2000 time, earlier and later cars have the 150bhp engine. Later 156's had the revised camshaft tensioner.

Don't forget that the 156 is "fly by wire" too, dunno how much that would affect the engine but its bound to affect the ECU and some other ancilliaries.

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Re: 145 v 146 v 155 v 156 2.0 ts engines

....and the rocker covers are different

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jason77
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Re: 145 v 146 v 155 v 156 2.0 ts engines

wrinkles.. the 16v 156 engines ain't fly by wire.. only V6 one is

Mr_T had to change his accelerator cable... this is how i know.. i thought they were all FBW too.

J
 
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Re: 145 v 146 v 155 v 156 2.0 ts engines

doh!

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Pascs
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Re: 145 v 146 v 155 v 156 2.0 ts engines

Quote:
Originally Posted by jason77
wrinkles.. the 16v 156 engines ain't fly by wire.. only V6 one is

Mr_T had to change his accelerator cable... this is how i know.. i thought they were all FBW too.

J
And the 16v Selespeed engine is fly by wire but then so is the gearbox and clutch
 
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Re: 145 v 146 v 155 v 156 2.0 ts engines

heh of course there is the exception for the selespeeds

j
 
mal
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Re: 145 v 146 v 155 v 156 2.0 ts engines

Doesn't the 155bhp and probably later 150bhp 156 engine have that variable inlet manifold stuff as well as the variable valve timing of the 155?
 
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Re: 145 v 146 v 155 v 156 2.0 ts engines

I think it's all the same...
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Re: 145 v 146 v 155 v 156 2.0 ts engines

the later 145/146 engines (155bhp as opposed to the earlier 150bhp engines) have variable length inlet manifold. A plastic chambers of flaps and motors... doesn't fully open until about 5k rpm, then (with a cone air filter) suddenly drops in tone and gets louder. Was introduced for noise emmissions. They explode/implode quite spectacularly apparantly when they go wrong!!

Also the later 155bhp 145/6 variant has the placcy cam cover cover(!) and the same ECU as the 156/147 - mounted on top of the throttle body as opposed to under the carpet. The ECU on the throttle body is not swappable EEPROM - only serial reprogrammable as opposed to the earlier EEPROM type. Both still Bosch

I believe all engine internals are the same (apart from updates of course) with the only difference being the (minor & swappable) ancilliaries.

Maybe..

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Re: 145 v 146 v 155 v 156 2.0 ts engines

Well actually all the CF3 156 are fly by wire as of about 99/2000. and in my opinion its a much better engine with all its new bits'n'bobs on.
 
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Re: 145 v 146 v 155 v 156 2.0 ts engines

Quote:
Originally Posted by Pascs
And the 16v Selespeed engine is fly by wire but then so is the gearbox and clutch
the gearbox isnt fly by wire neither is the clutch,it uses a standard(ish)gearbox and clutch it just has a stupid electro hydralic gubbins on it that operates on the standard(ish) gear selector rods and clutch arm.
 
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Re: 145 v 146 v 155 v 156 2.0 ts engines

Thanks ajcarter and jimmy bob- never knew that stuff. All that I have to offer is that I believe the earliest phase one engines (150 bhp) had no EGR valve whereas the phase 2 (155bhp), and later retuned phase 3 engines had an EGR valve.
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Re: 145 v 146 v 155 v 156 2.0 ts engines

@Ally spot on, another point I forgot.

Also the 156 (155bhp) & 145 (155bhp)have very different ign & fuel maps - having driven a 156 2.0 extensively in comparison to my 145, the 156 has much more low torque, and is much smoother. The 145 revs a lot better under heavy acceleration.
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