V6 vs. I6 (YACT)

[flood]

From what I hear, all things being equal, a straight 6 will produce more torque than a v6 while the v6 will have more top end power.
I'm not sure why this is, but my guess is that the v6 has a short stroke and the straight 6 has a long stroke.
Does anyone know the answer?

 

[Tom]

Just looking at output, there isn't any particular advantage to either one,IMHO. Stroke could be the same with either.

I6 cheaper to make.

V6 squarer shape so easier to fit in shorter space. Also inherently somewhat smoother.

The difference can be mostly overcome with good engineering.

 

[notfred]

bore and stroke have nothing to do with where the cylinders are placed relative to each other.

 

[GTaudiophile]

From what I understand, V6 engines are inherently unstable. I6 engines are not.

Everyone knows that BMW makes the best I6 engines in the world, and they are renown for 1) their almost electric smoothness, and 2) ability to make their horses "seem" more powerful than others. Having driven a few BMW I6s and many V6s from Toyota/Infiniti, I have to agree with the twp points I just made.

 

[rgwalt]

I've got an I6 in my Jeep.

Just thought I would share.

 

[Sharpie]

Who has the biggest inline 6 here? I have a 300 cubic inch (4.9L) in my truck

 

[NFS4]

Originally posted by: GTaudiophile
From what I understand, V6 engines are inherently unstable. I6 engines are not.

Everyone knows that BMW makes the best I6 engines in the world, and they are renown for 1) their almost electric smoothness, and 2) ability to make their horses "seem" more powerful than others. Having driven a few BMW I6s and many V6s from Toyota/Infiniti, I have to agree with the twp points I just made.

Nissan's VQ V6 can make just about anyone forget about BMW's 3.0 liter I6

 

[rootaxs]

Originally posted by: NFS4
Nissan's VQ V6 can make just about anyone forget about BMW's 3.0 liter I6

 

[z0mb13]

Originally posted by: NFS4

Originally posted by: GTaudiophile
From what I understand, V6 engines are inherently unstable. I6 engines are not.

Everyone knows that BMW makes the best I6 engines in the world, and they are renown for 1) their almost electric smoothness, and 2) ability to make their horses "seem" more powerful than others. Having driven a few BMW I6s and many V6s from Toyota/Infiniti, I have to agree with the twp points I just made.

Nissan's VQ V6 can make just about anyone forget about BMW's 3.0 liter I6

really??

how many HP and torque does it pump out?? (the nissan one)

 

[boyRacer]

Straight sixes are supposedly smoother than their V angled counterpart... as far as power is concerned... i doubt that has anything to do with it.

 

[ElFenix]

inline 6s don't require power robbing balance shafts like a v6 does. thats worth quite a bit of power... a v6 is actually cheaper to make nowadays, and they're far easier to try to fit in a car.

 

[vi edit]

A "V" engine is unbalanced and has a rotating mass to it if I remember the correct terminology. They are inheriently inefficient. Since an inline engine has pistons that go straight up and down, instead of at an angle, it doesn't have that rotating mass robbing it of power accounting for the better output.

 

[NFS4]

Originally posted by: z0mb13

Originally posted by: NFS4

Originally posted by: GTaudiophile
From what I understand, V6 engines are inherently unstable. I6 engines are not.

Everyone knows that BMW makes the best I6 engines in the world, and they are renown for 1) their almost electric smoothness, and 2) ability to make their horses "seem" more powerful than others. Having driven a few BMW I6s and many V6s from Toyota/Infiniti, I have to agree with the twp points I just made.

Nissan's VQ V6 can make just about anyone forget about BMW's 3.0 liter I6

really??

how many HP and torque does it pump out?? (the nissan one)

It depends on the variant:

3.5 liter V6

245/246 -- Altima
287/274 -- 350Z
280/270 -- G35 Coupe

 

[Radiohead]

Originally posted by: NFS4

Originally posted by: GTaudiophile
From what I understand, V6 engines are inherently unstable. I6 engines are not.

Everyone knows that BMW makes the best I6 engines in the world, and they are renown for 1) their almost electric smoothness, and 2) ability to make their horses "seem" more powerful than others. Having driven a few BMW I6s and many V6s from Toyota/Infiniti, I have to agree with the twp points I just made.

Nissan's VQ V6 can make just about anyone forget about BMW's 3.0 liter I6

WORD

What about flat 6's then?

 

[boyRacer]

Originally posted by: Radiohead

Originally posted by: NFS4

Originally posted by: GTaudiophile
From what I understand, V6 engines are inherently unstable. I6 engines are not.

Everyone knows that BMW makes the best I6 engines in the world, and they are renown for 1) their almost electric smoothness, and 2) ability to make their horses "seem" more powerful than others. Having driven a few BMW I6s and many V6s from Toyota/Infiniti, I have to agree with the twp points I just made.

Nissan's VQ V6 can make just about anyone forget about BMW's 3.0 liter I6

WORD

What about flat 6's then?

Porsche and Subaru...

 

[bmacd]

i have an inline 6 in my jaguar

-=bmacd=-

 

[Radiohead]

Why do they make them flat though?

 

[FrustratedUser]

Originally posted by: Radiohead
Why do they make them flat though?

Low center of gravity.

 

[boyRacer]

Originally posted by: FrustratedUser

Originally posted by: Radiohead
Why do they make them flat though?

Low center of gravity.

Yup... didn't work for the Ferrari Testarossa though... since they had to mount the engine over the transmission... Gordon Murray who designed the McLaren you all adore admires the F40 but thinks the Testarossa was crap...

 

[NFS4]

Originally posted by: BoYRaCeR

Originally posted by: FrustratedUser

Originally posted by: Radiohead
Why do they make them flat though?

Low center of gravity.

Yup... didn't work for the Ferrari Testarossa though... since they had to mount the engine over the transmission... Gordon Murray who designed the McLaren you all adore admires the F40 but thinks the Testarossa was crap...

That's b/c it WAS crap...especially the 512M

 

[FrustratedUser]

Originally posted by: NFS4

Originally posted by: BoYRaCeR

Originally posted by: FrustratedUser

Originally posted by: Radiohead
Why do they make them flat though?

Low center of gravity.

Yup... didn't work for the Ferrari Testarossa though... since they had to mount the engine over the transmission... Gordon Murray who designed the McLaren you all adore admires the F40 but thinks the Testarossa was crap...

That's b/c it WAS crap...especially the 512M

I'd still take one.

 

[boyRacer]

Originally posted by: FrustratedUser

Originally posted by: NFS4

Originally posted by: BoYRaCeR

Originally posted by: FrustratedUser

Originally posted by: Radiohead
Why do they make them flat though?

Low center of gravity.

Yup... didn't work for the Ferrari Testarossa though... since they had to mount the engine over the transmission... Gordon Murray who designed the McLaren you all adore admires the F40 but thinks the Testarossa was crap...

That's b/c it WAS crap...especially the 512M

I'd still take one.

Me too. Like girls care that its dynamics are crap.

 

[PG]

Here's a little bit if info that most might not know.

A 4 stroke engine takes 2 complete revolutions to complete the intake, compression, power and exhaust cycle. That's 720 degrees of crank revolution. Divide that by the number of cylinders and you get a number that would equal the proper V angle. Example: 720/8 cylinders is 90 and V8 engines have a 90 degree V angle. A 6 cylinder would need a 120 degree V angle, but that would take too much space so they typically go with 60, a nice multiple of 120, but some are 90 as well. Those won't be as smooth though. V10's are sort of odd balls and I think the Dodge and Ford have a 90 degree V angles. The Ford V10 needs a balance shaft from what I read, but I don't know what Dodge does.

 

[ElFenix]

Originally posted by: vi_edit
A "V" engine is unbalanced and has a rotating mass to it if I remember the correct terminology. They are inheriently inefficient. Since an inline engine has pistons that go straight up and down, instead of at an angle, it doesn't have that rotating mass robbing it of power accounting for the better output.

actually a V8 is harmonicly balanced as well... i'm guessing its because theres a power stroke on each bank on the same 1/2 rev

 

[vi edit]

actually a V8 is harmonaly balanced as well... i'm guessing its because theres a power stroke on each bank on the same 1/2 rev

Probably largely related to PG's post I'm guessing Also, might have something to do with them sitting in the bay fairly level instead of turned on end like some V6's that are shoehorned into some enginebays.