VAG 1.8T Engine differences...

[Angry Dog]

What are the core differences in the 1.8T engines?

The Audi TT has 225bhp.
The Audi A4 1.8T has 150bhp.
The Passat 1.8T has 150bhp.
The Skoda Octavia vRS has 180bhp

and it seems the Golf 1.8T is 150bhp as well.

so whats different?

[mluton]

If im correct, all the below are the same:
Golf 1.8T, 180 BHP
Golf 1.8T, 150 BHP
TT 1.8T, 180 BHP
Passat 1.8T, 150 BHP
vRS, 1.8T, 180 BHP

But the TT 1.8T 225 BHP is the same block with a bigger turbo and other changes.

[Angry Dog]

are the parts inter-changeable?

[mluton]

I got my info from here mate, have a read:
http://www.briskoda.net/forums/octavia/180-225-difference/86214/

[Seat til I die]

yeh the 225 engine is mpi whereas (correct me if im wrong) the 210hp is EFi and the ones below are multi-rail?? or EFi... not sure... not even sure what im talking about, lol but the fuel injection systems are definitely different anyway.

I have often wondered this as well, what 'other' changes are there?? I can only guess but would have thought flywheel, camshaft, intercooler changes would make some difference but 65 horsepower is quite some difference on a 1.8T so surely some more major changes exist besides ecu limitations and bigger turbo...

[onzarob]

I alway assumed the main difference would be stronger internals, ie strengthen crank/pistons/con-rods and bigger valves. Basically so the engine would remain durable with the extra power/bigger trubo

[onzarob]

MPI/EFI is all injection really just marketing names.

The main difference you can get it Multi point IE injector per cylinder and Single point. one injector then a manifold. a bit like an electronic carburetor.

I would not expect to see any VW/AUDI 1.8T with single point injection;)

[Seat til I die]

I would not expect to see any VW/AUDI 1.8T with single point injection;)


no obviously not! :Blush:

but the EFi system is surely a more crude design than the MPi used on the 225, and something tells me less effecient too... or have they just fooled me by changing the name of the very same fuel injection system???

[onzarob]

Sorry the last car with EFI on i saw was a Montego!!!!;)

Whats the latest meaning for EFi and MPi :dunno::confused:

[Angry Dog]

are the engines / ecu's interchangeable - ie if you found an engine from a TT and the ECU, would they slot in with no wiring changes to a Passat 1.8 T?

[onzarob]

are the engines / Eco's interchangeable - ie if you found an engine from a TT and the ECU, would they slot in with no wiring changes to a Passat 1.8 T?

No but thats to do with the TT being a transverse engine and the Passat an in-line:D

[Angry Dog]

No but thats to do with the TT being a transverse engine and the Passat an in-line:D

Im quite sure that if that is the only reason, then its easy to overcome ;)

I had a transverse engine fitted inline in a sierra i had years ago!

if the heads are the same, then the manifolds should inter changeable..

[onzarob]

I don't think it iimpossible, but by the time youve change the sump, flywheeel manifold, turbo (diferent inlet/outlet) etc it would be easier to get a transverse with all the goodies.

[Angry Dog]

I don't think it iimpossible, but by the time youve change the sump, flywheeel manifold, turbo (diferent inlet/outlet) etc it would be easier to get a transverse with all the goodies.

true! why do it with a standard engine when you could use a more modified one..

just throwing idea's around, although im sure once i've remapped the future Passat, i'd be happy with at as a runaround (which is what its main job is going to be lol)

[onzarob]

true! why do it with a standard engine when you could use a more modified one..

just throwing idea's around, although im sure once i've remapped the future Passat, i'd be happy with at as a runaround (which is what its main job is going to be lol)

Very true, why not but the TT to go round the engine, if its out out driving you want:biglaugh:

[Angry Dog]

Very true, why not but the TT to go round the engine, if its out out driving you want:biglaugh:

I dont like the TT. just doesnt look the car for me.

ive always liked saloon cars.

[APRTuned_GTI]

basically turbos, different gearboxes, and other parts e.g 1.8T 180 6-speed box, 1.8T 150 5-speed box, slightly smaller turbo

[traubenberg]

What are the core differences in the 1.8T engines?

The Audi TT has 225bhp.
The Audi A4 1.8T has 150bhp.
The Passat 1.8T has 150bhp.
The Skoda Octavia vRS has 180bhp

and it seems the Golf 1.8T is 150bhp as well.

so whats different?

I feel so special ...my Passat 1.8T was making 170hp from the factory (engine code AWM). Then again, so were all of the 3BG models from 01-05.

And yes, the TT has a bigger turbo. (Is it the K04?)

Also, I wasn't aware that the 3B A4 made 150hp. The ones with which I'm most familiar all produce 180hp at the crank.

Skoda's not available here, so I can't say one way or the other.

[a8 tech]

this may help http://forums.vwvortex.com/zerothread?id=450388

[APRTuned_GTI]

yeah the 225 TT has the K04 turbo, also the same as the leon cupra R 225 and the audi S3

[prolfe]

Here is quite a good little article on the 1.8T from a tuning companies perspective:

http://www.torquecars.com/volkswagen/vag-1-8-turbo.php

The 1.8 litre lump is the most common block of all VAG engines.

[pgarner]

ok from my very limited knowlage the engines are all roughly the same

the 150 engines use the k03 turbo
the 180 engines use the k03s turbo one wheel (compression i think) is 5mm bigger larger valve ports and different map
the 210-225 uses the k04 turbo, both wheels 5mm larger than the k03, larger injectors 310 compared to 280cc (280 in the 180 from what ive found out not sure about the 150), different intake maifold MAF sensor and i think its the same head used on the 180.

the engine has nothing to do with being inline or transverse mounted as the s3 and cupra R use the same engine and they are transverse are they not?