Thanks for the info and insights....I also enjoy a good discussion/debate.
I agree with your towing assessment...but another area I’d like to explore is the whole concept of putting a 2.0 litre 4-banger in a big vehicle that weighs over 4 thousand pounds...that can carry up to 7 people, their luggage and tow another 2,000 pounds? That seems like a lot of stress for a small motor...or am I being old-fashioned? Isn’t this the same motor originally designed of the Golf GTI? The power (HP & Torque) are probably acceptable, but what I’m concerned about is the stress on the motor. Is there any long term history/data to support this kind of configuration...or is it just a silly trend by automakers to improve fuel economy numbers on paper? Or am I just rambling...? LOL
Like many others, I too was confused about the 2.0T motor and VW listing premium unleaded in the adverts for the 2018 model...but that messaging seems to have magically disappeared for current models. Funny how that happens. My guess it’s because there seems to be a trend lately in the CUV/SUV market where companies are trying to squeeze the most out of 4-bangers by upping the horsepower (and compression ratios)...which is requiring those motors to use premium unleaded...and VW doesn’t want people to think they need to put expensive gas in their cars to seem more competitive. Makes sense to me. 🤓
Also I fully understand the difference between regular and premium unleaded...especially in turbo/super-charged applications where the compression ratios are very high. The 2.0T in the Atlas seems to be at 10.5:1 under normal load, and up to 13:1 under boost (could be wrong...just going by the Wikipedia article listed below). If that is accurate, then 13:1 is easily managed with good regular gas...ie. little-to-no knock. When you start pushing high compression ratios (like a super-charged car I have that goes up to 24:1 😬)...then premium is a must!
I did some checking and I don’t fully understand why you keep calling the 2.0T motor in the Atlas the EA888? I believe it’s the EA113...the EA888 is very close in design (I think it was based on the EA113)...and is currently used in the Tiguan. The source of my info:
List of Volkswagen Group petrol engines - Wikipedia
Cheers! 🍺
Thank you for the reply.
First of all, it is EA888 Gen 3😂.
Volkswagen Atlas - Wikipedia Here's what Wiki has about Atlas. I only did a rough search online. EA113 you mentioned is TFSI, EA888 is TSI. I guess that's the main difference?
If not for the cheap price of the Atlas, I personally always prefer a bigger engine. So yeah, a little old fashioned 😅.
I assume, a 300hp 2.0T and a 300hp 3.0T running at peak power would consume similar amount of fuel and air, because of you know, physics. It's the less-than-peak scenario where smaller engine will shine. Less weight, less cyl, less displacement, equal to less fuel consumption. And for daily use, 99% of the time we are using the engine at less-than-peak level. And it's cheaper, That's why it is getting so popular. And make higher end cars more accessible.
As for your thought on "small horse large wagon", I partially agree. To be fair, with much newer technology, engines are more efficient, though they are getting smaller, getting less cyl, they have higher power to liter, or power per cyl ratios. So for the most user out there, for a compact SUV and alike, a 2.0T is well enough. Even for big cars like Atlas, BMW X5 and alike, high-output 2.0T offers less power than a bigger engine but it also saves weight. So it can still be properly quick off the line. Overtake on the highway does not feel any push in the back, but the speed goes up quickly enough. May feel a bit gasping for power when you are trying to floor it for fun, but for majority user scenarios (daily commute, city, highway, grocery trip, weekend road trip, etc), it is enough. I think the occasion where you simultaneously fill the car with 7 people and full of luggage while towing a 5000lbs trailer to be very rare😂.
Yes initially the 2.0T was for Golf and Jetta, for a 3-Series, for C-Class. But now they are on the big Atlas, the luxurious 7-Series, S-Class (in some regions), and even sports car like F-Type. For modern car engineering, almost everything is modular. Each same physical part can be reconfigured for a different car model to save cost. The majority of the parts of 2.0T from a 2020 Golf and a 2020 Atlas should be the same. The tuning is different and there may be some detailed change to accommodate for Atlas's heavier load and different user scenarios (more daily, less fun drive, etc).
Carmakers here also played with the gear ratios to make the car feel "more powerful" off the line. Of all the vehicles I've driven, 2016 Mustangs, 2.3T vs 5.0L V8, BMW 4-Series 2.0T vs 3.0T and 3.0 twinturbo (M4), and others, smaller 4 cyl engines always feel "more powerful" off the line because of a very short 1st gear. This can of course increase the happiness of everyday grocery drive for an average owner. So even after the test drive, some people would choose the smaller engine. (Like I did with my Cross Sport).
So overall, I think this is more of a trade-off problem that each customer has to deal with. With the VR6, on the up side, you get about 30+hp, you can worry less when you have your car filled with people and luggage and towing a trailer. On the down side, the VR6 powertrain it's heavier, thus the actual effective hp gain is less, there's more deadweight you are dragging. And more cyl roughly equals slightly worse fuel economy for city driving.
As for the fuel grade, I didn't know about 2018 and 2019 models. But they did claimed that 87 was acceptable for the EA888. (on the inside of the filler cap, it says 87 minimum, 89 recommended) Maybe the reason is like what you said.
Nowadays everything in the car, the trans software (TCU), the ECU, the anti-knocking, everything is "adaptive". So even for a supercharged vehicle with a 24:1 compression ratio like you said, as long as 87 is claimed acceptable, the engineers can make it work. Use software to detect knock and adjust timing and relative stuff to prevent knock for the next time. The end result is like I mentioned in the last post, lower grade fuel equals less power output. The ECU will try its best to protect the engine from blowing up. So no worries. If you put 87 in a 91minimum car, the CEL(Check Engine Light) will come on and the engine will not run, because the ECU protection is "out of range".
As for the potential of the 2.0T, AMG's 2.0T is other carmakers' pioneering example LOL (That small dude can crank up 400+hp stable).