2022 Jeep Grand Cherokee (WL74) Specifications...

[redriderbob]

 

[redriderbob]

 

[redriderbob]

 

[wandatin]

I did not see an EPA rating for the 2.0-Liter Turbo I-4. But am I correct in assuming it gets 22 mpg? During the reveal, they said the 4xe gets 25 miles all electric and 443 miles total. That leaves 418 miles on the gas engine, and the specifications say the 4xe has a 19 gallon tank. That comes out to 22 mpg.

 

[clivem]

Yeah, I'm a bit confused by this also. In Metric terms that's 10.3 l/100km which is absolutely terrible for a hybrid. Guess we'll need to wait for some real world testing.

I did not see an EPA rating for the 2.0-Liter Turbo I-4. But am I correct in assuming it gets 22 mpg? During the reveal, they said the 4xe gets 25 miles all electric and 443 miles total. That leaves 418 miles on the gas engine, and the specifications say the 4xe has a 19 gallon tank. That comes out to 22 mpg.

 

[Indigovic]

Yeah, I'm a bit confused by this also. In Metric terms that's 10.3 l/100km which is absolutely terrible for a hybrid.

Wandatin‘s calculation literally subtracted out 100% of the fuel efficiency benefit that the battery adds. Given that their whole point was to estimate the efficiency of the gas engine alone, the result should look terrible for a hybrid!

 

[clivem]

Still confused. The reveal video specifically said a range of 700km and the specs say the 4xe has a 72 litre tank so that's 10.3l/100km. Or am I missing something?

 

[wandatin]

Wandatin‘s calculation literally subtracted out 100% of the fuel efficiency benefit that the battery adds. Given that their whole point was to estimate the efficiency of the gas engine alone, the result should look terrible for a hybrid!

Yes, I simply subtracted the all electric range from the overall range to determine the gas only mpg. But I expected it would still operate in hybrid mode once the all electric range is depleted. The 2.0-Liter in the non-4xe Wrangler also gets 22 mpg. So it appears that once the all electric range is depleted, it doesn't really get any benefit from running in hybrid mode.

With that said however, if the mpg on gas really is 22 mpg, that is still 1 mpg better than the V6.

 

[Indigovic]

Your estimate seems sound to me IF they calculated the range by simply adding battery-only range to gas-only range, meaning that you don’t benefit from any regen (charging the battery from braking, etc.) during the gas-only portion of the trip. In the real world, this would mean driving a fully-charged car in ESave (gas only) mode until you run out of gas, then switching to electric mode until you run out of charge. (Which nobody would ever do.)

If I were calculating the total range, I’d approach it differently: I’d presume you made the entire trip in Hybrid mode, during which the battery is both drained from use AND charged from regen, which I believe would extend the total range quite a bit, in addition to more realistically reflecting how people would really drive.

If they calculated it my way, then we don’t have enough info to determine the efficiency of the gas engine by itself… but the number would definitely be lower than your estimate, as you’d need to subtract the number of miles gained from regen before you do the miles per gallon division, which can only lower the result.

 

[wandatin]

That's the thing I find frustrating Indigovic about the EPA using the MPGe designation. That number is somewhat meaningless to me.

I am happy that Jeep was able to get 25 miles of range on electric only. That happens to be my distance to work. So I will theoretically be able to do the majority of my driving using only electricity.

 

[savio.80]

There is an error at page 3: "engine 2.0 TurboI4" is 121 cu.in. instead of 221 cu.in.

 

[Indigovic]

Stellantis finally added actual content to their media page for the 2022 Grand Cherokee:

https://stellantis-na-product-media...e-grand-cherokee-srt-grand-cherokee-trackhawk