...
I was confused by the T8 ER as there is so much and so little information online of the wrong platform. Even today, reviewers are labeling this 22.5 and newer as a "TWIN ENGINE". (ie: supercharger).
...

Twin Engine refers to the additional electric motor at the rear, unrelated to the turbo charger and superchargers that may/may not be on the car.

 

I'm don't have access to the specifics and I'm not a tech but I look at the naming (T5, T6 etc.) as simply an HP indicator. I look at the numbers as 50hp... T5 roughly 250hp, T6 roughly 300hp, T8 roughly 400hp. All of the ICE engines in the US use the same 2.0 Liter 4 cylinder engine. T5s get a light pressure turbo putting out (varies slightly per model) 250hp. T6s had the turbo and the belt driven super charger. T8s (before extended range) had the T6 engine under the hood and an electric motor in the rear.

Now, by that though process, the T8 extended range should technically be a T9... but, alas, that one falls short of my theory. Anyway... with the increased power from the larger battery and more powerful electric motor, there was no longer a need for a super charger to compensate for turbo lag. Instead (and this is where I'm guessing) the engine in the T8 extended range has a high pressure turbo and no super charger. If someone has access to the boost figures, they could validate or invalidate this theory.

Then came the B engines. B5 is basically the same as the T5 except it is the (horribly named) mild hybrid. Still a light pressure turbo boosting a 2.0 liter engine and coming in just shy of 250 hp. The B6 mild hybrid gets the 2.0L engine with an electric super charger (instead of belt driven) and a turbo coming in at about 300hp. And the T8 for the 2023 model year in the US is the same as the 2022.5 T8 extended range as noted above.

And, as Pioneer4x4 said... Twin Engine in Volvo's world refers to the pure electric AWD models with two electric motors (front and rear). Otherwise know as Recharge Twin. And formerly known as P8.

I hope that helps.

 

...
And, as Pioneer4x4 said... Twin Engine in Volvo's world refers to the pure electric AWD models with two electric motors (front and rear). Otherwise know as Recharge Twin. And formerly known as P8.

I hope that helps.

Not what I meant. "Twin Engine" is 2 engines/motors, not 2 EV motors.
Not my car, but same as my car, 2019, 2.0 ICE up front, and EV in the back, Twin Engine.

 

One thing to note, the B6 is much slower than the old T6 in acceleration, according to testing. I have been wondering for quite a while about the composition of the recharge ER ICE powertrain. Why is it a more powerful engine than the B6? Electric turbo or just ISG, something else? Is it slower than the old T6 but masked by the stronger new ERAD?

Volvo is the only car company that doesn’t seem excited about giving details on their newest electric hybrid power rains.

 

The nomenclature "TWIN" seems to be loosely used all around. For most is just easier to say TWIN, but only adds to the confusion.

**Been looking around Volvo press release material and different Volvo sites. I was able to download some of the material for xc60 which carries the same engine.

"Turbocharged Engine A specially modified version of Volvo’s 4-cylinder, 2.0 Liter gasoline engine provides 312 hp and 295 lb.-ft. torque. When combined with the rear electric motor, up to 455 hp & 523 lb. ft. of torque is available to the driver." It does have the Crankshaft-Mounted Integrated Starter Generator enabled for 34kW at 111lb ft of torque. It coordinates with the turbo for low end movement. The media guide does also talk about the B5 and B6 variant for mild hybrid. The B6 does get a electric supercharger or "e-charger" as they also call it for 295hp. They both (B5/6) get 13hp from the ISG. They also get Brake by wire
*
Here is what I found.
It is a new engine variant: H6
Our gearbox:

Gearbox

code

1:st gear

2:nd gear

3:rd gear

4:th gear

5:th gear

6:th gear

7:th gear

8:th gear

Rev. gear

AW TG-81SD

D

eAWD

5.250

3.029

1.950

1.457

1.221

1.000

0.809

0.673

4.015

Our electric motor: ERAD 7

	ERAD 7
SoP week:	21w47
kW / rps	107	/	265
electrical hp / rpm	143	/	15900
metric hp / rpm	145	/	15900
mechanical hp / rpm	143	/	15900
Nm / rps	309​	/	0	-	3280
lb-ft / rpm	228	/	0	-	3280

Engine

ENGINES				B4204T57
			Engine code / Rear emblem:	H6	/	Recharge T8 AWD
			SoP week:	21w47
	Emission level		EU:
		US:	TZEV
		China:
		Japan:
CYLINDERS			(number)	4
DISPLACEMENT			(cm3 / cu.in)	1969	/	120.2
BORE			(mm / inch)	82.0	/	3.23
STROKE			(mm / inch)	93.2	/	3.67
VALVES			(number)	16
DOHC/SOHC				DOHC
COMPRESSION RATIO				10,3:1
FIRING ORDER				1 - 3 - 4 - 2
IDLE SPEED			(rpm)	875	±	50
MAX ENGINE SPEED			(rpm)	6000
			Overrev. / duration	6300	/	3 s
MAX ENGINE NET POWER			(kW / rps)	233	/	100
			(metric hp / rpm)	317	/	6000
			(mechanical hp / rpm)	312	/	6000
MAX ENGINE RATED POWER			(kW / rps)
(for China authority submission )			( hp / rpm)
MAX ENGINE TORQUE			(Nm / rps)	400	/	50	-	90
			(ft.lbf / rpm)	295	/	3000	-	5400
ELECTRIC MOTOR *				Yes
HIGH VOLTAGE BATTERY *				Yes

Disc brakes: METIC: ENGLISH:

Disc brake dimensions	Disc diameter	front	Brake: 17” / 18” / 20"	322	/	345	/	400	12.7	/	13.6	/	15.7
		rear	Brake: 16” / 17”	302	/	320	11.9	/	12.6
	" thickness	front	Brake: 17” / 18” / 20"	28	/	30	/	38	1.1	/	1.2	/	1.5
		rear	Brake: 16” / 17”	12	/	20	0.5	/	0.8

Performance:

VEHICLE PERFORMANCE	Final drive	Top speed *	Acceleration times
(governed)	(sec)
Engine	code		Gearbox	code		km/h	mph	0 - 100 km/h	0 - 60 mph
B4204T57	H6		AW TG-81SD	D	eAWD	3.329	180	112	4.8	4.5

Electrical speed tops at 87 MPH!!!

 

The nomenclature "TWIN" seems to be loosely used all around. For most is just easier to say TWIN, but only adds to the confusion.

**Been looking around Volvo press release material and different Volvo sites. I was able to download some of the material for xc60 which carries the same engine.

"Turbocharged Engine A specially modified version of Volvo’s 4-cylinder, 2.0 Liter gasoline engine provides 312 hp and 295 lb.-ft. torque. When combined with the rear electric motor, up to 455 hp & 523 lb. ft. of torque is available to the driver." It does have the Crankshaft-Mounted Integrated Starter Generator enabled for 34kW at 111lb ft of torque. It coordinates with the turbo for low end movement. The media guide does also talk about the B5 and B6 variant for mild hybrid. The B6 does get a electric supercharger or "e-charger" as they also call it for 295hp. They both (B5/6) get 13hp from the ISG. They also get Brake by wire
*
Here is what I found.
It is a new engine variant: H6
Our gearbox:

Gearbox

code

1:st gear

2:nd gear

3:rd gear

4:th gear

5:th gear

6:th gear

7:th gear

8:th gear

Rev. gear

AW TG-81SD

D

eAWD

5.250

3.029

1.950

1.457

1.221

1.000

0.809

0.673

4.015

Our electric motor: ERAD 7

	ERAD 7
SoP week:	21w47
kW / rps	107	/	265
electrical hp / rpm	143	/	15900
metric hp / rpm	145	/	15900
mechanical hp / rpm	143	/	15900
Nm / rps	309​	/	0	-	3280
lb-ft / rpm	228	/	0	-	3280

Engine

ENGINES				B4204T57
			Engine code / Rear emblem:	H6	/	Recharge T8 AWD
			SoP week:	21w47
	Emission level		EU:
		US:	TZEV
		China:
		Japan:
CYLINDERS			(number)	4
DISPLACEMENT			(cm3 / cu.in)	1969	/	120.2
BORE			(mm / inch)	82.0	/	3.23
STROKE			(mm / inch)	93.2	/	3.67
VALVES			(number)	16
DOHC/SOHC				DOHC
COMPRESSION RATIO				10,3:1
FIRING ORDER				1 - 3 - 4 - 2
IDLE SPEED			(rpm)	875	±	50
MAX ENGINE SPEED			(rpm)	6000
			Overrev. / duration	6300	/	3 s
MAX ENGINE NET POWER			(kW / rps)	233	/	100
			(metric hp / rpm)	317	/	6000
			(mechanical hp / rpm)	312	/	6000
MAX ENGINE RATED POWER			(kW / rps)
(for China authority submission )			( hp / rpm)
MAX ENGINE TORQUE			(Nm / rps)	400	/	50	-	90
			(ft.lbf / rpm)	295	/	3000	-	5400
ELECTRIC MOTOR *				Yes
HIGH VOLTAGE BATTERY *				Yes

Disc brakes: METIC: ENGLISH:

Disc brake dimensions	Disc diameter	front	Brake: 17” / 18” / 20"	322	/	345	/	400	12.7	/	13.6	/	15.7
		rear	Brake: 16” / 17”	302	/	320	11.9	/	12.6
	" thickness	front	Brake: 17” / 18” / 20"	28	/	30	/	38	1.1	/	1.2	/	1.5
		rear	Brake: 16” / 17”	12	/	20	0.5	/	0.8

Performance:

VEHICLE PERFORMANCE	Final drive	Top speed *	Acceleration times
(governed)	(sec)
Engine	code		Gearbox	code		km/h	mph	0 - 100 km/h	0 - 60 mph
B4204T57	H6		AW TG-81SD	D	eAWD	3.329	180	112	4.8	4.5

Electrical speed tops at 87 MPH!!!

wow this is the best info I’ve seen yet, although I think testing will reveal an even better 0-60. Still trying to understand how the h6 is socially modified. I agree that the fairly powerful ISG is likely explanation.

I was hoping they’d make a short duration boost mode on erad and ISG to really pump acelleration when needed.

 

Did some more looking and didn't really come up with anything else. I will say that after somewhat extensive looking - the 22.5 (B4204T57) is a One off engine. As the new my23 engines is labeled as B4204T56 engine code: It is a Turbocharged w/ E-Boost. Same output. Most likely 22.5 was the "prototype" before they (Volvo) gave it an official code. Per Polestar Opt pages, the Variant will still be a H6 to my understanding for variants go. There is a 2hp combustion difference with the 57 getting a slightly higher output than 56. Additionally the 57 gets a 300 RPM "overdrive" over the 6K RPM. The 56 does not.
The gearing are the same but the final drive is different: 57 is 3.329 and the 56 is 3.075

Congratulations to whomever got a 22.5 across all platforms for this one off engine..
I will continue to look. If anyone has access to VIDA technical data. That would be helpful - a service manual at all?? Any other information on on the engine 57?

 

Congratulations to whomever got a 22.5 across all platforms for this one off engine..

are you talking that to yourself your tag says you got 22.5 T8

 

There is a Korean article that states this "The engine of the XC60 Recharge has been changed to an e-boost turbo engine (B4204T57) from the method in which a supercharger and a turbocharger were used together in the past (B4204T34)."

Does that makes sense to anyone?

 

Here is an article on a possible solution to our Volvo engine for "E-Boost" using Audi Electric supercharger..

AutoZine Technical School

AutoZine Technical School

www.autozine.org

An older article on Volvo making the twin concept for E-boost

Volvo's new electric supercharger...turbocharger...what exactly is it?

New forced induction system uses electric motor to spin impeller

www.autoweek.com

 

As many have said “Twin Engine” simply means gas engine + EV motor. What I didn’t hear which I think caused the initial confusion from the first post was that the T6 4cyl at its debut was called “Twin Charged” meaning both turbo and supercharged. Easy to mix those up.

 

? Volvo restricts top speed on all their cars to 112mph... it's not unique to the S60.

There are methods to override the speed limiter if you car about that kind of thing. Not something worth worrying about.

 

Does anyone know the difference between B4204T53 & B4204T57? On paper, they seem to be identical in terms of output. Australia has the '53' variant, have been trying to understand the difference, there seems to be absolutely no info on that.

 

Very interesting. Too bad we have to read the tea leaves to figure out how our cars work!
What I make of this is that my T8 2023 is tri-engine, because that enhanced starter motor in the front is about 50 hp, so it must be assisting in starting the movement as well as starting the ICE!
I wonder if it is the electric motor that provides mild hybrid in other models.

 

Very interesting. Too bad we have to read the tea leaves to figure out how our cars work!
What I make of this is that my T8 2023 is tri-engine, because that enhanced starter motor in the front is about 50 hp, so it must be assisting in starting the movement as well as starting the ICE!
I wonder if it is the electric motor that provides mild hybrid in other models.

Sorta. It definitely adds power, and since it is attached to the engine, it is more noticeable in lower gears (I.E. LAUNCH!), and anywhere I see it mentioned it is under "dynamic" power or something like that, which to me means "temporary" like 10 seconds at a time.
If I floor it on a roll, and compare that to floor it from a dead stop, it feels totally different. Like the ISG is only used from a stop or something.
And yeah, would be AWESOME if Volvo clearly published this stuff better.

 

I have a 22.5 v60 polestar. Is the actual borg warner turbo electric? Or regular? I think it's regular. Unless I'm missing something.

Volvo reveals 450-hp 4-cylinder with electric-aided turbo

Audi recently unveiled a high-performance diesel engine that featured a pair of turbochargers and an electric motor that helps provide boost pressure at low revs. The technology is expected to debut in 2016 in a high-performance version of Audi’s next-generation Q7 SUV and slowly filter across...

www.motorauthority.com

Edit: so it seems like a regular turbo after looking at some parts diagrams. Looking at Part Number: 36010097

 

That article is almost 10 years old, doesn't apply anymore. (and isn't really accurate to what they eventually came out with.)

 

Hello Friends,

I've just taken delivery of a v60 T8 and very curious about the new technologies being applied to the single turbo B4204T57 engine as well. I am also researching on the C-ISG unit as I am kind of interested in the mechanics between the engine, C-ISG and the Aisin TG-81SD transaxle. Unfortunately, technical info beyond the marketing material about the newer Extended Range T8 powertrain is almost nonexistent. I will take some pictures of the B4204T57 and post them here soon. As far as I know, the B4204T57 will be a bit more efficient and less complicate since it no longer has any belt driven accessories attached to the engine although it still retains the timing belt design.

 

I uh... understood some of those words. Car go vroom.