[RPiM5]

Just saw this from Dinan Engineering.

Both the M550i and the F90 M5 have AWD and virtually have the same exact transmission too. So maybe it's worth it save yourself $30,000 and just tune up an M550i instead? Unless you plan on tracking either car, then the F90 M5 is the better choice no contest.

What say you?

[frankchn]

Building both cars to approximately the same level (same quality of leather, same features, etc...), I ended up with a M550i build worth $87,825 and a M5 build of $109,600, so realistically it is a difference of $21,775 between the cars without tuning. Looking at Dinan's pricing, you are probably spending at least $3,000 more if you do the work yourself (+150hp is not trivial to achieve), so that brings it to a $19,000 price difference.

I think I'll take the M5 with an M-tuned xDrive, M suspension, M seats, and 4/50 factory warranty for $19,000 more in that case. I think the more interesting question is whether to buy an M5 or an Alpina B5.

Of course, if you only care about power and specify a stripped down M550i, the price difference is larger, but then what's the point? I like my nice leather, ventilated seats, heated steering wheel, adjustable suspension, and Apple Carplay integration in my car If someone only cares about very large horsepower figures, they can get a Challenger Hellcat.

[TheRealOrosie]

Originally Posted by RPiM5

Just saw this from Dinan Engineering.

Both the M550i and the F90 M5 have AWD and virtually have the same exact transmission too. So maybe it's worth it save yourself $30,000 and just tune up an M550i instead? Unless you plan on tracking either car, then the F90 M5 is the better choice no contest.

What say you?

I had a Dinan Stage 3 F10 550i MSport 6 speed. Loads of torque...way too fast for its chassis/brakes. Fun car.

[vtknight]

Originally Posted by Hill Country F90

I had a Dinan Stage 3 F10 550i MSport 6 speed. Loads of torque...way too fast for its chassis/brakes. Fun car.

I think this is the key point...I have the M550ix as I await my M5 next year (2019 allocation). It is a quick car stock - I ran 12.1 at 117 MPH with stability control still on. That said - and like every review - the chassis and handling components are soft - because this is still a luxury car first - which I really like. So much so - I was worried the M5 would be too stiff for me for day to day...so far the reviews say the different settings are solid.

But - back to the point - the M5 is much more than its engine. From its chassis to the individual suspension tuning controls, to the brakes...So it depends what you want. Luxury with a bunch more power - go M550ix tuned (not necessarily by Dinan) - if you want performance luxury GT - I would say M5.

[uniqueMR]

Originally Posted by vtknight

But - back to the point - the M5 is much more than its engine. From its chassis to the individual suspension tuning controls, to the brakes...So it depends what you want. Luxury with a bunch more power - go M550ix tuned (not necessarily by Dinan) - if you want performance luxury GT - I would say M5.

I agree, M is M. No doubt!!

[Tonymiabmw]

Originally Posted by RPiM5

Just saw this from Dinan Engineering.

Both the M550i and the F90 M5 have AWD and virtually have the same exact transmission too. So maybe it's worth it save yourself $30,000 and just tune up an M550i instead? Unless you plan on tracking either car, then the F90 M5 is the better choice no contest.

What say you?

Wait until they start tuning the f90. Plus steering, suspension different turbos. M5 is a different beast. You can’t compare the two.

[RPiM5]

Originally Posted by Tonymiabmw

Wait until they start tuning the f90. Plus steering, suspension different turbos. M5 is a different beast. You canÂ’t compare the two.

The S63tu4 engine has the same exact limits as the S63tu, meaning the internals are still cast. People will still be bending rods on future F90's that are modded. The main advantage in the F90's drivetrain as far as modding goes is the new ZF8 transmission that will be able to hold more than 700wtq. But then again, the M550i has the same exact transmission hardware so it'll have the same limits as the F90. The F90 will have the advantage in suspension design though.

[Tonymiabmw]

Originally Posted by RPiM5

The S63tu4 engine has the same exact limits as the S63tu, meaning the internals are still cast. People will still be bending rods on future F90's that are modded. The main advantage in the F90's drivetrain as far as modding goes is the new ZF8 transmission that will be able to hold more than 700wtq. But then again, the M550i has the same exact transmission hardware so it'll have the same limits as the F90. The F90 will have the advantage in suspension design though.

Really? So we won't see f90s pushing 800hp on stock internals anytime soon? I thought s63tu had many cars pushing 800 on the f10.

[RPiM5]

Originally Posted by Tonymiabmw

Really? So we won't see f90s pushing 800hp on stock internals anytime soon?

Well I don't know about anytime soon, but the two biggest makers of power are tuning and turbos. But even a legitimate flash tune can make over 650whp on one of these engines and with the internals still being stock, you are definitely asking for trouble even at that power level.

But I'm sure we'll be seeing the same old stuff of tuners out in the world somewhere posting videos of tunes making 900whp on some dyno for the F90 M5 on stock internals. Wash, rinse, repeat from the F10 generation to the F90. Many of these tuners just want your cash and could care less if you bomb your motor. But hey, if you're gonna bomb your motor, might as well do it on a cheaper M550i.

[MTHX]

Originally Posted by RPiM5

The S63tu4 engine has the same exact limits as the S63tu, meaning the internals are still cast. People will still be bending rods on future F90's that are modded. The main advantage in the F90's drivetrain as far as modding goes is the new ZF8 transmission that will be able to hold more than 700wtq. But then again, the M550i has the same exact transmission hardware so it'll have the same limits as the F90. The F90 will have the advantage in suspension design though.

You seems aware of m5 engine and tunning. Are you aware of engine problem with stage 1 tune, like jb1 or something like that?

Intake ...

Or prioblem are more on heavy modified M5?

Tks

[RPiM5]

Originally Posted by MTHX

You seems aware of m5 engine and tunning. Are you aware of engine problem with stage 1 tune, like jb1 or something like that?

Intake ...

Or prioblem are more on heavy modified M5?

Tks

Either on the F90 or F10 with JB1 and Bolt On mods you will be fine.

[M6-Coupe]

Originally Posted by frankchn

Building both cars to approximately the same level (same quality of leather, same features, etc...), I ended up with a M550i build worth $87,825 and a M5 build of $109,600, so realistically it is a difference of $21,775 between the cars without tuning. Looking at Dinan's pricing, you are probably spending at least $3,000 more if you do the work yourself (+150hp is not trivial to achieve), so that brings it to a $19,000 price difference.

I think I'll take the M5 with an M-tuned xDrive, M suspension, M seats, and 4/50 factory warranty for $19,000 more in that case. I think the more interesting question is whether to buy an M5 or an Alpina B5.

Of course, if you only care about power and specify a stripped down M550i, the price difference is larger, but then what's the point? I like my nice leather, ventilated seats, heated steering wheel, adjustable suspension, and Apple Carplay integration in my car If someone only cares about very large horsepower figures, they can get a Challenger Hellcat.

+1

[M6-Coupe]

Originally Posted by RPiM5

The S63tu4 engine has the same exact limits as the S63tu, meaning the internals are still cast. People will still be bending rods on future F90's that are modded. The main advantage in the F90's drivetrain as far as modding goes is the new ZF8 transmission that will be able to hold more than 700wtq. But then again, the M550i has the same exact transmission hardware so it'll have the same limits as the F90. The F90 will have the advantage in suspension design though.

Dave, as far as I know you, you will pick F90 M5 over M550 too...

[irishbimmer]

Originally Posted by M6-Coupe

Dave, as far as I know you, you will pick F90 M5 over M550 too...

So true!

[RPiM5]

Originally Posted by M6-Coupe

Dave, as far as I know you, you will pick F90 M5 over M550 too...

Of course I would. M5 all day every day. Lol!

However, Caddy just released new information on their future plans with their cars and motors and it's for lack of a better word, "astonishing." We may need only wait a couple of years and CT6 V-Sport will be a far better performance car than an M550i. I'm already guessing the next gen CTS-V will be north of 700hp too and will be easily tuned to over 1,000hp since it'll come from the factory with a forged motor. Crazy times ahead for sure!

[mirob]

Here's Parker (don't judge me) doing some semi-scientific test runs (I say semi because he's on some hills...no telling if he's doing these tests on a flat surface). Seems like the M550i just can't launch as hard as the M5.

Enjoy.

EDIT: If you want to skip his annoying drivel, "testing" starts at ~14:30.