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TDI 101 Got a simple/basic TDI question? Are you a newbie (new to the forums). Feel free to post your question here.

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Old October 11th, 2019, 17:42   #1
426HPSS
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Default Why not the 1.4T instead?

Been a few years.
Was onto other cars and have recently bought a 19 Jetta 1.4T SEL 6 speed...in usa or Execline in Canuck land.
Simple premise. Amazing economy and amazing torque and power. No DPF and no fuel filters and NO expensive diesel fuel. Regular gas! I used to get 5.0 litres per 100 Kms in my old TDIs and now I get 4.8 litres on way to Montreal.
My question is simple. Is the diesel not truly dead now that VW has worked around the basis for buying it? My numbers are highway and dead accurate. Pump to pump and not on the sometimes inaccurate dash computer.
Cheapest fuel in Canada and usa is plain old regular...
Blown away by this powertrain...durability? Who knows....
Comments?
Expensive 508/509 spec oil though only avail at dealer here. What a VW control joke that is!! When out of warranty I will be going to Mobil 1 0-20 or 5-20 unless someone can tell me my engine will blow up with Mobil 1.

Last edited by 426HPSS; October 11th, 2019 at 17:43. Reason: Typo
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Old October 11th, 2019, 18:20   #2
[486]
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4.8l/100km is 48 mi/usg for those of us south of the border
Very nice mileage. I've noticed similar with my mom getting 38 mpg out of an 09 corolla automatic, and she drives hard enough to go through a set of tires and brakes every 20k miles. Something about that variable valve timing just gets nutty fuel economy.
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Old October 11th, 2019, 18:20   #3
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No fuel filter?- that doesn't sound right. But yeah, new diesel cars are basically dead here. Cars in general are disappearing in favor of hulking SUV's, pickups, and crossovers. VW's 1.4t is a pretty darn good surrogate for a tdi from what I've been hearing.
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Old October 11th, 2019, 18:36   #4
426HPSS
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My apologies. Yes fuel filter but NO ongoing steady regular maintenance fuel filter as in a diesel.
Hey I love diesels but this has to be the best work around diesels around... In my opinion.
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Old October 11th, 2019, 19:52   #5
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I've heard nothing but good things about the VW 1.4T.

Certain other manufacturers seem to have trouble getting good real-world fuel consumption out of downsized turbo gasoline engines (*cough* Ford), but this one seems to be for real.
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Old October 11th, 2019, 20:05   #6
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The real world fuel economy of the 1.4 TSI is about 7L/100km, which is not bad.

However, my TDI gets 5.6L/100km and with a stage 4 tune, has way more power.

Diesel here costs $1.38/L while regular gas is $1.63/L, so the 1.4 TSI would cost quite a bit more to drive.

Given that TDIs are no longer available, the 1.4 is a reasonable replacement, but it’s definitely not the same. I have driven a Jetta TSI and it’s just....meh. Decent A to B transportation for sure, but not a TDI.
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Old October 11th, 2019, 21:03   #7
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Assuming the OP lives in the real world too, his fuel savings with the 1.4T seems legit. Mazda, Toyota, and others also have some impressively efficient gasoline 4 cylinder engines these days. When you factor in the lack of emissions equipment that modern diesels are saddled with, they are almost certainly considerably more reliable.
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Old October 11th, 2019, 21:24   #8
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Default Millions of miles of experience!

Here is thought to consider: When comparing passenger vehicle efficiencies you want to look at the expected (average) MPG based on as large database as possible. Here is what Fuelly.com shows for the 2017 Jetta with the 1.4T engine (CZTA):

"Based on data from 67 vehicles, 3,755 fuel-ups and 1,580,398 miles of driving, the 2017 Volkswagen Jetta gets a combined Avg MPG of 36.38 with a 0.18 MPG margin of error."

This is equivalent to 6.47 L/100 Km
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Old October 11th, 2019, 22:13   #9
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The combined Fuelly rating for a '15 jetta tdi is 41 mpg. Around here that would make the 1.4T burning RUG @ 36 mpg slightly cheaper to fuel.

Last edited by turbobrick240; October 12th, 2019 at 02:11.
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Old October 12th, 2019, 10:56   #10
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I think I would prefer a larger turbocharged engine - say, the 2.0T in the Tiguan.


I'm not so crazy about Ford's EcoBoost engines either.
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Old October 12th, 2019, 12:50   #11
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Of course, as we all know, the size of the vehicle matters in terms of the cost/benefit of diesel vs gasoline. The larger the vehicle the better cost/benefit for the diesel vs the gasoline.

For the American standards a VW Jetta would be considered a relatively small sedan. The newer VW Tiguan is probably where a TDI engine would do well in terms of mass/size (37.6 ft³ of cargo space) ratio to efficiency and performance (torque) and would be a vehicle that the average American would prefer over a sedan (even over a Passat which is larger than the Jetta).
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Old October 12th, 2019, 23:32   #12
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Quote:
Originally Posted by scooperhsd View Post
I think I would prefer a larger turbocharged engine - say, the 2.0T in the Tiguan.


I'm not so crazy about Ford's EcoBoost engines either.
My wifes 1.8t 2015 golf gets about 5l -5.5l on the highway which is nearly what my tdi does , sometimes better than my tdi. Little less torque at 200 ftlbs but more top end at 170 hp. I was surprised, earlier gen 1.8ts gave the large displacement engines a bad name and I was skeptical. VW got the gen3 ea888 engines right.

Pity north America didn't get the 1.2t or 1.0t , quite nippy in smaller cars but of course everyone wants SUVs nowadays so definitely not going to see them this side of the pond.
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Old October 13th, 2019, 05:55   #13
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Quote:
Originally Posted by tikal View Post
Of course, as we all know, the size of the vehicle matters in terms of the cost/benefit of diesel vs gasoline. The larger the vehicle the better cost/benefit for the diesel vs the gasoline.

For the American standards a VW Jetta would be considered a relatively small sedan. The newer VW Tiguan is probably where a TDI engine would do well in terms of mass/size (37.6 ft³ of cargo space) ratio to efficiency and performance (torque) and would be a vehicle that the average American would prefer over a sedan (even over a Passat which is larger than the Jetta).
I don't consider the MK5 and newer Jettas to be small cars. They keep getting bigger every generation. I believe the MK7 jetta is bigger than a MK5 passat. I don't understand this, not everyone wants huge cars. Its to the point now there is no new cars I really want to buy. Just imagine the VW 1.4T in a small aerodynamic car, 50+mpg on regular gas would be no problem.
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Old October 13th, 2019, 07:16   #14
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Yeah but load up the 1.4 with 4-5 passengers and luggage and watch the mileage go all to h e l l !

Do same with a diesel and it makes hardly any difference !
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Old October 13th, 2019, 07:50   #15
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5 passengers? There must be a clown convention in town.
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