Just been mulling-over Skoda's specs for the facelifted Octy and noticed that this new (?) petrol unit gives a great combination of economy and performance. If the figures are to be believed the DSG-equipped 1.8 TSI L&K returns better fuel economy than the corresponding manual and is only 10-15% less fuel efficient than the PD140 diesel. I wonder if this will be borne out in the real world?

And now for the stupid question; is this 1.8 TSI turbocharged, or not?

Cheers,

Bill.

Yes

New VAG TSI engines in both 1.8 and 1.4 guise are not only terrific powerplants in terms of performance but return pretty impressive fuel economy too, you'd have to be driving intergallactic mileage to warrant buying the diesel variants in my opinion.

.................. and yes, TSI engines are turbocharged and some are even supercharged but not in the Skoda range at the moment.

1.4TSi 122bhp is turbocharged only.

1.4 TSi 160bhp is turbocharged & supercharged (aka twincharger) in the new Golf GT.

1.8 TSi 160bhp is turbocharged only.

The new 'dry' 7 speed DSG that is used in all of the above has a maximum tolerance of 170bhp and 250Nm of torque.

Edited 7 May, 200917 yr by Bassa

Thanks guys. I guess there's no escaping forced-induction for my next car be it the petrol or diesel variant.

Last time I owned a turbo-equipped car I used to drive my wife mad every time we reached our destination and I'd make her wait for a couple of minutes to let the turbo cool down; never had a turbo problem though . Is this prudent practice with turbo diesels too (sorry, never owned a diesel before)?

I do as much as I can, especially if I've been spanking it. It's one of the best ways to wind up a wife going.

1.4TSi 122bhp is turbocharged only.

1.4 TSi 160bhp is turbocharged & supercharged (aka twincharger) in the new Golf GT.

1.8 TSi 160bhp is turbocharged only.

The new 'dry' 7 speed DSG that is used in all of the above has a maximum tolerance of 170bhp and 250Nm of torque.

Thought the turbo / super 1.4 was 170bhp?

New VAG TSI engines in both 1.8 and 1.4 guise are not only terrific powerplants in terms of performance but return pretty impressive fuel economy too, you'd have to be driving intergallactic mileage to warrant buying the diesel variants in my opinion.

Unless you just fancy one of course

Thought the turbo / super 1.4 was 170bhp?

The new Golf in GT guise, which has the 'twincharger' 1.4TSi unit, has maximum power quoted as 160 PS at 5800 rpm. The PS figures are slightly higher than BHP figures, so its true BHP equivalent is actually around 158bhp. There is an accurate PS to BHP conversion formula but the difference is only minimal. Maximum torque with the Golf GT is 240Nm at 2000rpm.

The 1.8 TSi (not used in the new Golf) has more or less the same quoted maximum power as the 1.4 TSi twincharger but produces slighly more torque with figures of 250Nm between 1500 to 4500 rpm

The one cause for concern for me is that 250Nm of torque is at the maximum tolerance with the new dry 7 speed DSG transmission - at least the smaller capacity twincharger engine in the Golf is 10Nm below the maximum tolerance.

As far as the Octavia is concerned, the only UK model to pair the 1.8 TSi with the 7 speed DSG is found on the L & K model, the Elegance only being available in manual form.

Not sure why Skoda did not go with the smaller capacity 1.4 TSi twincharger rather than going with the 1.8 TSi, especially when mated to the 7 speed DSG giving its tolerance levels?

Edited 8 May, 200917 yr by Bassa

Not sure why Skoda did not go with the smaller capacity 1.4 TSi twincharger rather than going with the 1.8 TSi...

I think they've made a right decision. I'm a bit scared of low displacement high power & torque engines and their long-term reliability.

And of course - there's no replacement for displacement.

Concerning the fuel economy - mine settles with 7l / 100km (motorway, normal driving), 10l / 100km (motorway, speeding over 150kmh), 10l / 100km (city).

Average around 8,5 - 9l / 100km. (1.8 TSI 6spd manual, Elegance).

I think they've made a right decision. I'm a bit scared of low displacement high power & torque engines and their long-term reliability.

And of course - there's no replacement for displacement.

Volkswagen obviously are not!

The 1.8 TSi is fine with the manual transmission, it is with the 7 speed DSG where its torque sits at that transmission's peak tolerance is cause for some concern.

Of course, the equally powerful 1.4 TSi twincharger scores over the 1.8 TSi when it comes to emissions and mpg.

Th twin charger was 170 bhp in the Golf mk 5. I wonder why they've dropped the power slightly? I think it probably has to work a bit harder than the 1.8T to deliver the power.I have driven a 170, and while brisk, wasn't as quick as I'd have expected.

The 1.8 TSi is fine with the manual transmission, it is with the 7 speed DSG where its torque sits at that transmission's peak tolerance is cause for some concern.

Of course, the equally powerful 1.4 TSi twincharger scores over the 1.8 TSi when it comes to emissions and mpg.

You keep on saying Peak Tolerance as if the transmission will go BANG if it gets 251Nm.

250Nm is the current Peak Rating. Engineers rate things for general use but the failure point is generally way above the rating . If I'm buggering around with a bracket that has to hold 10kg then if it's for a massed produced car I'll probably design a 20-30kg bracket. If its for a race car, I might slim it back a bit and make a 15kg bracket. In all cases I'll put a Load Limit of 10kg on it.

Eventually, as the 7 speed proves itself they will raise the rating. The 6 speed is rated for 380Nm (?) but plenty of upgraded cars are putting bigger numbers than that through them without issue. Sure the overall life might be a bit less but is a 400,000km lifespan rather than 500,000km a problem?)

To the OP. I have a 1.8TSI. Love it to bits. I get low 6/100km on the motorway. High 7/100km in suburban traffic. Average high 6/100km 70%motorway/30% suburbs. Maximum infringement-safe cruise speed here is ~115kmh

You keep on saying Peak Tolerance as if the transmission will go BANG if it gets 251Nm.

I'm not saying it will go "bang" as you put it at 251Nm but nonetheless, the 1.8TSi with the 7 speed DSG sits at that transmission's published maximum torque level. Personally I feel far more comfortable when that transmission is paired with the 122 bhp TSi.and its 200Nm maximum torque.

The reverse of my earlier query as to why did Skoda go with the 1.8TSi instead of the 1.4TSi twincharger - why did Volkswagen, in the new Golf GT, choose to go with the 1.4TSI twincharger over of the 1.8 TSi ?

You keep on saying Peak Tolerance as if the transmission will go BANG if it gets 251Nm.

The reverse of my earlier query as to why did Skoda go with the 1.8TSi instead of the 1.4TSi twincharger - why did Volkswagen' date=' in the new Golf GT, choose to go with the 1.4TSI twincharger over of the 1.8 TSi ?[/quote']

Slightly better economy and emissions I would think. Plus a dash of marketing and branding exclusivity: VW were fairly early adopters of the small capacity / high power technology but didn't share it much around the the rest of the VW group. Only recently have Seat and Skoda got the 1.4 120

Buyers tend to be still a bit uneasy about small capacity engines in larger cars: the Golf is probably seen to be small enough, but I don't know how popular the 1.4 Superb will be.

Incidentally the latest edition of What Car reviews the Golf 160, and while rating the engine, says it doesn't suit the DSG which is rather jerky with it.

I'm not saying it will go "bang" as you put it at 251Nm but nonetheless, the 1.8TSi with the 7 speed DSG sits at that transmission's published maximum torque level. Personally I feel far more comfortable when that transmission is paired with the 122 bhp TSi.and its 200Nm maximum torque.

I still don't think you understand what a rating is. It's just a nominal figure they have applied to the transmission because that's how much torque the 118kw engine puts out. As the transmission proves itself they will fit torquier engines & raise the max torque rating accordingly.

I made some enquiries & if it makes you feel any better the 7speed has been designed for engines up to 480Nm output.

I still don't think you understand what a rating is. It's just a nominal figure they have applied to the transmission because that's how much torque the 118kw engine puts out. As the transmission proves itself they will fit torquier engines & raise the max torque rating accordingly.

I made some enquiries & if it makes you feel any better the 7speed has been designed for engines up to 480Nm output.

Some built in tolerance is understandable but if it is 480Nm as you state which is nearly double, why do they publish 250Nm ?

The Bugati Veyron also uses a 7 speed DSG version and that box can supposedly cope with 1250Nm !

Some built in tolerance is understandable but if it is 480Nm as you state which is nearly double, why do they publish 250Nm ?

It's an engineers thing I'd guess. Put a cap on it & if anyone mods their engine & has transmission problems they have an out. You can do all the testing you want but sometimes problems only arise when things are mass produced & the public get their hands on things.

Similar happens with aircraft. There will be a published take-off/landing/cargo weight or a published "X-hours between services" and years down the track it will be revised (up or down) based on real life performance or failure rates.

Again, I'd have no issues running the 1.8T with the 7 speed (from a reliability point of view).

It's an engineers thing I'd guess. Put a cap on it & if anyone mods their engine & has transmission problems they have an out. You can do all the testing you want but sometimes problems only arise when things are mass produced & the public get their hands on things.

Similar happens with aircraft. There will be a published take-off/landing/cargo weight or a published "X-hours between services" and years down the track it will be revised (up or down) based on real life performance or failure rates.

Again, I'd have no issues running the 1.8T with the 7 speed (from a reliability point of view).

The 2.0ltr vRS FSi ,which produces 200bhp and 280Nm of torque goes with the older and less efficient 'wet' 6 speed DSG rather than the newer dry 7 speed version ????

The 2.0ltr vRS FSi ,which produces 200bhp and 280Nm of torque goes with the older and less efficient 'wet' 6 speed DSG rather than the newer dry 7 speed version ????

Give it time.

i am very happy with my 1.8tsi DSG 7.

great engine even when pushed it does not sound to suffer. The box is smooth when driven smoothly. when i drive fast then it might be a bit jerky when starting from green, that is happening due to the fact that the box is adapting my driving style. Driving then for a few miles smoothly it adapts a smoothy drive...

I made some enquiries & if it makes you feel any better the 7speed has been designed for engines up to 480Nm output.

Who said that?

Who said that?

Guy Harding. He's the Australian Distributor for APR, Oettinger & some other bits & pieces.

Zee Chermans come out to his workshop a couple of times a year to bed in the Australian spec tunes and he has a fair handle on stuff like that.