When I was looking at buying a Roomster with the 1.2l/77kW TSI EU5 engine (77kW = 105bhp ?) the saleman stated that the TS stood for Turbocharged and Supercharged.

I don't think that the engine is Supercharged and that the salesman was telling a porky.

However, I'd be most interested in getting hold of a Workshop Manual to read.

Does the team have any recommendation on a genuine source?

The 1.2 TSi (86bhp and 105bhp) are only turbocharged

Salesmen usually have no idea about the mechanics of the cars they sell The 1.2's are indeed only turbocharged. Also extremely impressive!

There is this little presentation video, which explains the engine well.

Edited 21 August, 201114 yr by Mike Wrightson

Salesmen usually have no idea about the mechanics of the cars they sell The 1.2's are indeed only turbocharged. Also extremely impressive!

There is this little presentation video, which explains the engine well.

Many thanks for linking the interesting video.

I guess TSI is for Turbocharged Stratified Injection.

However, an everpending question among German and Italian VAG forumgoers is:

What are the main differences between a 86 Hp and a 105 Hp TSI engine?

VW seems to be very reserved about it.

Somebody say it is the same engine with different software and ECU setups.

Anybody any news?

Edited 22 August, 201114 yr by Lorenzo

Thank God in Greece we have only 1.2Tsi 77Kw (105Hp) so we don't have such confusing dilemmas. Though I think the oil volume differs from 2.6 (or so) for 68Hp to 3.6 (mine needed 4.2 the last oil change to reach dipstick's area C) for 105Hp, but this possibly is due to different temperature and pressure between two specs of the engine.

Few years ago when I owned an Octavia 1.6 Mpi 8v 102Hp, my dealer told me that she could be remapped up to 115Hp with no need for further modifications and no risk of damaging the engine. Of course I didn't remapped the car but that story drives me to conclude that the different output is due to different ECU mapping to the same engine block.

Summer night theories...

Edited 23 August, 201114 yr by stratosg

I guess TSI is for Turbocharged Stratified Injection.

However, an everpending question among German and Italian VAG forumgoers is:

What are the main differences between a 86 Hp and a 105 Hp TSI engine?

VW seems to be very reserved about it.

Somebody say it is the same engine with different software and ECU setups.

Anybody any news?

Nobody has been able to give a definate answer. I suspect the mechanicals are the same and the power reduction is due to ECU mapping. Possibly lower boost pressure or restricted throttle for the 86hp.

I think the 85BHP 1.2TSI is only a stop gap engine to fill the space in the range until the 1.0TSI engine arrives (which is in the new VW up!) and will likely be in other small VAG cars too in place of the old 1.4NA engine.

Therefore I guess it really is only running different engine mapping.

What Skoda Customer Service told me yesterday when I enquired about dual mass flywheel on the 1.2 TSI is that it is likely that, judging by what the mechanics team say, the 86 ps version is fitted with a single mass flywheel, unlike its counterpart. This is the same answer I recieved about the 1.2 TSI on the Golf, but I didn't specify the output when I asked VW.

What Skoda Customer Service told me yesterday when I enquired about dual mass flywheel on the 1.2 TSI is that it is likely that, judging by what the mechanics team say, the 86 ps version is fitted with a single mass flywheel, unlike its counterpart. This is the same answer I recieved about the 1.2 TSI on the Golf, but I didn't specify the output when I asked VW.

I have my doubts if this is true for the 1.2l/77kW TSI EU5 (petrol) engine powering my Skoda Roomster Scout.

However I asked my local Skoda dealer to put me though to a senior service engineer. She told me that she needs to know the vehicle registration to check what is fitted.

So it is inconclusive as per your? Honest John forum post after this:

Dual mass flywheels - Quinny100 Sat 11 Jun 2005 23:51

http://www.honestjohn.co.uk/forum/post/index.htm?t=32578&v=f

"(DMFs) tend to be fitted to a lot of the modern, higher powered diesels.

They are there to prevent torque spikes through the crankshaft from damaging the transmission. Such spikes are more likely to occur in engines that put out a lot of torque and run with high compression ratios."

I think the 85BHP 1.2TSI is only a stop gap engine to fill the space in the range until the 1.0TSI engine arrives (which is in the new VW up!) and will likely be in other small VAG cars too in place of the old 1.4NA engine.

Therefore I guess it really is only running different engine mapping.

Quite possibly, although the 1.0 is being done in two power levels as well. I think the 1.0 will replace the current 3 cylinder HTP engines, which are the last NA engines that VAG produce.

So VAG will have:

1.0 TSI in 2 power levels

1.2 TSI in 2 power levels

1.4 TSI currently 122bhp, they might add a new power level.

1.6 TSI from 180bhp upwards replacing the 1.4 twin charged TSI.

1.8 TSI though this might be dropped in favour of the 1.6.

2.0 TSI will only be seen in models with serious power, 250bhp and above.

Well after some searching and reading i found out that 1.2Tsi 63Kw engine is known as CBZA and 1.2Tsi 77Kw engine is known as CBZB engine.

For whole VW's engine list click here

For CBZA and CBZB click here (part from the above)

Looking at the ETKA parts system there appears to be no difference in any part numbers of the major components of the 85 and 105. Most striking thing is the number of items that have been updated with a new part number as production time has progressed, including the head, block and turbo.

TP

The TSi engine in the Roomster is turbocharged but not supercharged.

The 105PS is a great engine, I'm not sure of the actual mechanical differences between the 86PS and the 105PS but there is no way the 105PS actually produces that power, it feels more like 120PS and it is so torquey. An amazing 1200cc engine.