Pros and Cons of new 1.4 tsi Jetta

[Allergic2BunnyEars]

I'll check Erwin later...I have also heard the 1.4 tsi engine can take super as long as you drive it like a Granny...me personally I eh buy this vehicle to drive like a Granny as long as it has super in the tank.

[neexis]

Fire for that sheit... if u wanna drive like a granny, buy a March. But even the rep said to me premium only for the 1.4 cuz its high compression etc.

The 1.4 still seems more economical than the 1.8 using premium though. VWExec was saying 265 to fill up.. which might translate to about $380 a tank (at least). jah

[Pointman-IA]

Won't the super unleaded do damage to your engine block eventually?

[Allergic2BunnyEars]

I believe so. Was just saying what I heard with respect to super but I won't recommend it. I will use premium and adjust my driving style. If I can keep this current fuel economy up I can possibly get 900km out of a tank. That's crazy.

[cqk4]

Erwin says for the 1.4 CAVD, 95 but also 91 RON with reduced output. So you lose some hp's but I think the ecu is advanced enough to deal with the lower octane and use it safely.

I remember my lancer 2000 manual had 95 RON with 91 in case of emergency. That's different lol for comparison. Needless to say I ran super on it for years until it was sold..

[Allergic2BunnyEars]

I was now coming to post up what I found for the 1.8T engine in the passat via Erwin.
The same basically as the cavd engine: Ron 95 but can use unleaded Ron 91 which will result in reduced power. This holds for engine code CDAA, CDAB.

[VW_Exec]

Fire for that sheit... if u wanna drive like a granny, buy a March. But even the rep said to me premium only for the 1.4 cuz its high compression etc.

The 1.4 still seems more economical than the 1.8 using premium though. VWExec was saying 265 to fill up.. which might translate to about $380 a tank (at least). jah

not more economical - smaller tank I believe.
Yes; I've seen jump from $265/$270 (light first on) to $380.

Noted N&M today published VW Passat 1.8 as Super (Unleaded) friendly; interestingly, VW Passat 2.0 & CC are listed as Premium (Unleaded) only.

I, for one, will not be switching to Super (Unleaded) fuel. Rule of thumb with boosted/charged engines - higher the RON, the better for your engine life. I suspect the CR for the 1.8T engine is lower than the 2.0T and of course, the 1.4TSI is gonna be high (to compensate for displacement).

Sorry I haven't gotten back to you all on fuel consumption. Really do not observe the trip meter frequently as fill up is around once every 7 - 10 days.

Mechanically, so far - no issues. The tyre pressure alert system worked fabulously recently. Alerted me to check pressures as one tyre was not at other psi levels. Lo and behold, front passenger tyre was down to 21 psi (from 35 on others).

Got to tyre shop and they took out a nasty screw and plugged it up. Point is, car caught on to problem before it was a full flat tyre requiring jack-up/changing. Impressive and one of the reasons why I went for this car - creature comforts.

[Allergic2BunnyEars]

The CR of the 1.4 TSI is the same as the 1.8TSI i.e. 9.6:1. It's the reason why both can use 91 RON without knocking.

To make up for lack of displacement the 1.4 TSI uses a supercharger for improved power and response at low RPMs while the Turbo does the same at high RPMs. The 1.8 TSI uses one Turbo only since it has enough displacement to nullify the need for a supercharger.

[VW_Exec]

The CR of the 1.4 TSI is the same as the 1.8TSI i.e. 9.6:1. It's the reason why both can use 91 RON without knocking.

To make up for lack of displacement the 1.4 TSI uses a supercharger for improved power and response at low RPMs while the Turbo does the same at high RPMs. The 1.8 TSI uses one Turbo only since it has enough displacement to nullify the need for a supercharger.

I understand the charger differences which allows for same HP output from two different displacement engines.

But, assuming the CR's are the same, what is the local Dealer's reasoning then, for separating 1.8T Passat (Super) and 1.4TSI Jetta (Premium) from a fueling point of view?

Because an ECU can dial back ignition timing to compensate for lower RON fuel doesn't mean it's something you should do continuously. I'll check the manual later.

[Allergic2BunnyEars]

You right. Err on the side of caution. I believe that is what the dealer is doing by telling you use premium for jetta 1.4 tsi and 2.0T passat.

After checking another section of Erwin it lists 95 RON as minimum for these engines. Checked back the original section and it says 91 RON with reduced performance is allowed. So better to keep it simple and use the 95.

[nemesis]

The CR of the 1.4 TSI is the same as the 1.8TSI i.e. 9.6:1. It's the reason why both can use 91 RON without knocking.

To make up for lack of displacement the 1.4 TSI uses a supercharger for improved power and response at low RPMs while the Turbo does the same at high RPMs. The 1.8 TSI uses one Turbo only since it has enough displacement to nullify the need for a supercharger.

I understand the charger differences which allows for same HP output from two different displacement engines.

But, assuming the CR's are the same, what is the local Dealer's reasoning then, for separating 1.8T Passat (Super) and 1.4TSI Jetta (Premium) from a fueling point of view?

Because an ECU can dial back ignition timing to compensate for lower RON fuel doesn't mean it's something you should do continuously. I'll check the manual later.

It's not for caution. It's because the Jetta runs at approx 26psi of boost and the Passat is just over 18psi. And when the turbo hits on the Jetta I've seen on the net that some people logged 30+psi for a short period? Not sure how reliable that is..but either way the extra heat is why it needs better gas. Fairly certain if you try Super in the Jetta it won't work well, if at all.

[neexis]

But, assuming the CR's are the same, what is the local Dealer's reasoning then, for separating 1.8T Passat (Super) and 1.4TSI Jetta (Premium) from a fueling point of view?

Because an ECU can dial back ignition timing to compensate for lower RON fuel doesn't mean it's something you should do continuously. I'll check the manual later.

It would appear that the dealer is trying to make owning and maintaining these cars affordable... since premium fuel is expensive ting now, these cars may be excluded as options given the higher running costs.

I agree with you guys though: even if I buy one of these vw's, I don't even want to consider super in the gas tanks. Running 92 at reduced performance is one thing, but what's the long term effect on the engines?

Funny enough, the brochure sent by the dealer also specifies 95 RON as the minimum fuel grade.

[Allergic2BunnyEars]

Friend of mine mixes super and premium in equal halves on his jetta 1.4 tsi for the last two years. No issues shown yet. Not advocating but just sharing. I wonder if he's knocking but just doesn't know it?

[neexis]

did he ever report any noticeable performance differences with pure premium vs the mix?


also.... since BA is now saying it's ok to use super in the 1.8tsi, does this mean they'll cover any damage to the engine possibly caused by using a lower than recommended fuel grade?

[Allergic2BunnyEars]

did he ever report any noticeable performance differences with pure premium vs the mix?


also.... since BA is now saying it's ok to use super in the 1.8tsi, does this mean they'll cover any damage to the engine possibly caused by using a lower than recommended fuel grade?

He says no problems so far. He does blaze speed too and doing it for the last two years.

[neexis]

You achieved your 900km off one tank yet?

Any change in DSG rattles?

[Allergic2BunnyEars]

You achieved your 900km off one tank yet?

Any change in DSG rattles?

No. From about the 400 mark I switched back to old driving style. Missed speed. Was late for class a few times so sped. Had to drive around midday so needed ac. Got stuck in traffic a few times so all these lead to higher consumption. Ended up getting 600 km out of 49 litres of premium. Would have run it 52litres but had to make a long trip so ended up taking this pic just before filling up.

[Allergic2BunnyEars]

Also 7 speed dry clutch dsg inherently rattles due to its design. I don't lose sleep over it as that's how Vw intends for it to work.

[neexis]

Finally went in for the test drive today... Tried both cars as planned.

I must say the 1.4tsi greatly impressed me with its speed/power.

I listened closely for the rattling but was only able to hear it with the windows down going over some humps. The car wasn't pdi'd yet so there was no radio during the test. The engine is almost as loud as the corolla's when flooring it, but with much better and more effortless acceleration. A small tradeoff considering its power//size.

I can see the DSG taking some getting used to. There's a small lag/jerkiness when taking off from 0, but from 2nd gear its good. The car seems to be a tad bit more responsive than the passat... downshifting more and always ready to go. Sports mode makes that response a bit more aggressive. I tried stopping on an incline in D and a decline in reverse, but I anticipated its behavior based on your description. It's not really an issue, but probably better handled by the Passat.

Even though I was impressed with the Jetta, I'm leaning more towards the Passat. I'm still considering my options so I'll decide in a few weeks.

[Allergic2BunnyEars]

I never test drove the Passat. I'm sure it's a nice car but isn't my cup of tea styling wise as well as it was out of my price bracket. I prefer the idea of more speed for money. In the Jetta price bracket for new vehicles there wasn't anything faster so went with that. All the other features were extras as far as I was concerned. If I had money for Passat price I would again be looking at outright performance first with other things as bonus but that's just me.

I'm glad you like both. VW's lineup is pretty competitive. If you leaning towards the Passat you should do a Passat Pros and Cons thread

[neexis]

Haha I think I will start a thread

Don't get me wrong.... styling wise, I'd go with the Jetta ANYDAY. I'll admit that the styling has of the Passat has grown on me, but I still can't get used to the back of the car.. the jetta wins there no question.

For the price/value/performance, I've pretty much eliminated other manufacturers' offerings.. so I'm more or less pitting these cars against each other. As for the passat's price.. $70k difference doesn't seem that much considering what you getting.

[neexis]

I still keep hearing the sweet roar of the 1.4 TSI.... such power for one so small. and that supercharger just sounds sexy in the beginning

[Allergic2BunnyEars]

I still keep hearing the sweet roar of the 1.4 TSI.... such power for one so small. and that supercharger just sounds sexy in the beginning

Now you know why I drive with the radio off and windows down alot.

The 1.8T in the Passat doesn't sound good?

[cdx2k1]

http://www.youtube.com/watch?v=WiPRPbDVCTY

Golf R DSG doing 10's..

[neexis]

I still keep hearing the sweet roar of the 1.4 TSI.... such power for one so small. and that supercharger just sounds sexy in the beginning

Now you know why I drive with the radio off and windows down alot.

The 1.8T in the Passat doesn't sound good?

I didn't really hear it. Even with the radio low and the windows up it wasn't as pronounced as the Jetta's.
The jetta had a nice vrooom when floored, and it delivered power to match!

[Tired Accord]

Has anyone been able to verify if you can connect a USB stick to the stereo? I think a few pages back Allergic mentioned two accessory part numbers for that?

[neexis]

apparently you can get a usb adapter cable like this
http://www.drivergear.vw.com/vw10/SKUDe ... 51446B.asp
http://www.amazon.com/VW-000051446b-MDI ... B004FG1CXY

these guys have done it with the 510 system
http://forums.vwvortex.com/showthread.php?4802536

although... the sd card option doesnt look so bad... but apparently its limited to about 2000 songs

[neexis]

Allergic.. how much km you clock on the jetta so far?

[Allergic2BunnyEars]

11600.
Going in on 1st November for service.

[kingskid]

allergic how do you post pics? i have tried and it did not work.
does anyone else own the variant let us know how its going. its a grate all purpose car.
The best money I've spent on a car.