[99-ls1-ss]

Does anyone know if the M5 CS actually has different tuning and more (dyno proven) horsepower than the M5 Competition or is the power the same but the CS is faster because it's lighter? I've searched the interwebz and haven't seen any side by side dyno comparisons for these two vehicles.

*Edit - I'm trying to determine if the engine/transmission tuning is different between the M5 CS and the M5 Competition. I added performance numbers from Car and Driver below. I know there are a lot of factors that can change the performance of a vehicle like different weather, track conditions and driver skill. C/D is one of the few places that I've found that has tested all 3 versions of the f90.

Here are some specs according to Car and Driver

M5 CS
Power: 627 hp @ 6000 rpm
Torque: 553 lb-ft @ 1800 rpm
Curb Weight: 4096 lb
0-60 mph: 2.6 sec
0-100 mph: 6.2 sec
1/4-Mile: 10.6 sec @ 130 mph
150 mph: 15.5 sec
Rolling Start, 5–60 mph: 3.8 sec
Top Gear, 30–50 mph: 2.5 sec
Top Gear, 50–70 mph: 2.5 sec
Top Speed (mfr's claim): 190 mph
Braking, 70–0 mph: 150 ft
Braking, 100–0 mph: 294 ft
Roadholding, 300-ft Skidpad: 1.02 g

M5 Competition
Power: 617 hp @ 6000 rpm
Torque: 553 lb-ft @ 1800 rpm
Curb Weight: 4237 lb
0-60 mph: 2.8 sec
0-100 mph: 6.7 sec
1/4-Mile: 10.9 sec @ 128 mph
0-150 mph: 15.8 sec
Rolling Start, 5–60 mph: 3.7 sec
Top Gear, 30–50 mph: 2.5 sec
Top Gear, 50–70 mph: 2.6 sec
Top Speed (mfr's claim): 190 mph
Braking, 70–0 mph: 139 ft
Braking, 100–0 mph: 281 ft
Roadholding, 300-ft Skidpad: 1.00g

M5
Power: 600 hp @ 6600 rpm
Torque: 553 lb-ft @ 1800 rpm
Curb Weight: 4288 lb
0-60 mph: 2.8 sec
0-100 mph: 6.6 sec
1/4-Mile: 10.9 sec @ 129 mph
0-150 mph: 15.9 sec
Rolling start, 5-60 mph: 3.7 sec
Top Gear, 30-50 mph: 2.2 sec
Top Gear, 50-70 mph: 2.4 sec
Top speed (governor limited): 163 mph
Braking, 70-0 mph: 147 ft
Braking, 100–0 mph: Not tested
Roadholding, 300-ft-dia Skidpad: 0.98 g

[ResIpsaLoquitur]

Originally Posted by 99-ls1-ss

Does anyone know if the M5 CS actually has different tuning and more (dyno proven) horsepower than the M5 Competition or is the power the same but the CS is faster because it's lighter? I've searched the interwebz and haven't seen any side by side dyno comparisons for these two vehicles.

*Edit - I'm not asking about track times and handling, just straight line performance.

I’m not a CS owner, and I am not sure if this answers your question, and I haven’t seen dyno results to confirm this, but BMW definitely markets the Comp as having 617 hp and the CS as having 627 hp.

The CS obviously has a lot weight savings over the Comp, so you’ve got a little bit of both. But again, the CS does have more horsepower per BMW.

EDIT — Transcription errors from voice to text.

[99-ls1-ss]

Originally Posted by ResIpsaLoquitur

I’m not a CS owner, and I am not sure if this answers you’re question, and I haven’t seen Dano results to confirm this, but BMW definitely markets the Comp as having 617 hp and the CS as having 627 hp.

The CS obviously has a lot weight savings over the Comp, so you’ve got a little bit of both. But again, the CS does have more horsepower per BMW.

I edited my initial post to clarify what I was trying to determine.

[ResIpsaLoquitur]

Originally Posted by 99-ls1-ss

I edited my initial post to clarify what I was trying to determine.

Thanks for the clarification. I believe the same still holds, however. There is a difference in tuning of the engine for sure, though I am not sure about the transmission.

[JOHNBMWM5]

My m5 comp ultimate 2021/22 model dynoed @ 652BHP stock

[ResIpsaLoquitur]

Originally Posted by JOHNBMWM5

My m5 comp ultimate 2021/22 model dynoed @ 652BHP stock

Just as an aside, I know you’re discussing dyno results here, not BMW published numbers, but BMW does post (slightly) different HP figures for different markets, including the UK.

That’s a very impressive figure. Do you happen to know what brand the dyno was?

[crypto]

Originally Posted by ResIpsaLoquitur

Just as an aside, I know you’re discussing dyno results here, not BMW published numbers, but BMW does post (slightly) different HP figures for different markets, including the UK.

That’s a very impressive figure. Do you happen to know what brand the dyno was?

The HP figures are the same -- they are just calculated differently. I believe when the figures are higher they are using 1HP = 746W vs 1HP = 736W (diff of 1.01358695652). You should be able to take the US HP figure you see and multiply it by 1.01358695652 and get the UK/DE/etc figure (roughly).

[mavz]

Originally Posted by 99-ls1-ss

I edited my initial post to clarify what I was trying to determine.

Think you'd have to see if anyone did back-to-back-to-back dyno runs between them to accurately assess the differences in power. I'd be highly surprised if the CS didnt make some number more than the Comp esp if they sell it as making more.

[ScullyD]

Originally Posted by 99-ls1-ss

Does anyone know if the M5 CS actually has different tuning and more (dyno proven) horsepower than the M5 Competition or is the power the same but the CS is faster because it's lighter? I've searched the interwebz and haven't seen any side by side dyno comparisons for these two vehicles.

*Edit - I'm trying to determine if the engine/transmission tuning is different between the M5 CS and the M5 Competition. I added performance numbers from Car and Driver below. I know there are a lot of factors that can change the performance of a vehicle like different weather, track conditions and driver skill. C/D is one of the few places that I've found that has tested all 3 versions of the f90.

Here are some specs according to Car and Driver

M5 CS
Power: 627 hp @ 6000 rpm
Torque: 553 lb-ft @ 1800 rpm
Curb Weight: 4096 lb
0-60 mph: 2.6 sec
0-100 mph: 6.2 sec
1/4-Mile: 10.6 sec @ 130 mph
150 mph: 15.5 sec
Rolling Start, 5–60 mph: 3.8 sec
Top Gear, 30–50 mph: 2.5 sec
Top Gear, 50–70 mph: 2.5 sec
Top Speed (mfr's claim): 190 mph
Braking, 70–0 mph: 150 ft
Braking, 100–0 mph: 294 ft
Roadholding, 300-ft Skidpad: 1.02 g

M5 Competition
Power: 617 hp @ 6000 rpm
Torque: 553 lb-ft @ 1800 rpm
Curb Weight: 4237 lb
0-60 mph: 2.8 sec
0-100 mph: 6.7 sec
1/4-Mile: 10.9 sec @ 128 mph
0-150 mph: 15.8 sec
Rolling Start, 5–60 mph: 3.7 sec
Top Gear, 30–50 mph: 2.5 sec
Top Gear, 50–70 mph: 2.6 sec
Top Speed (mfr's claim): 190 mph
Braking, 70–0 mph: 139 ft
Braking, 100–0 mph: 281 ft
Roadholding, 300-ft Skidpad: 1.00g

M5
Power: 600 hp @ 6600 rpm
Torque: 553 lb-ft @ 1800 rpm
Curb Weight: 4288 lb
0-60 mph: 2.8 sec
0-100 mph: 6.6 sec
1/4-Mile: 10.9 sec @ 129 mph
0-150 mph: 15.9 sec
Rolling start, 5-60 mph: 3.7 sec
Top Gear, 30-50 mph: 2.2 sec
Top Gear, 50-70 mph: 2.4 sec
Top speed (governor limited): 163 mph
Braking, 70-0 mph: 147 ft
Braking, 100–0 mph: Not tested
Roadholding, 300-ft-dia Skidpad: 0.98 g

CS is also faster cause the suspension and damper tuning. The power is getting to the road better. As some youtube reviewers noted, they get consistent launches vs maybe 2 in every 10 or so with the M5C that would provide the best times.

But the CS is always so much more than straightline times, would be the last reason to buy the car honestly.

[Aronis]

The output of these different cars is an average of the model group. They are all within the margin of error of each other. I bet if you dyno'd 20 of each model you would get a group of data showing that the output is about the same for all models.

You'd see more of a difference among stock VS tuned groups, where the output is raised a lot over stock ? 100 hp or more.

Where as the CS at 627 vs the base at 600, 4.5 percent difference.

Mike

[damianwo]

M5C is over 700hp crank stock. Dynoed myself.

[pbonsalb]

Car and Driver dyno tested an M5 Comp at 617 at the rear wheels on a Dynojet, which is about 700 at the crank using the common 15% drivetrain loss. https://www.caranddriver.com/feature...no-horsepower/

Results will vary depending on the dyno so not all dyno results can be compared. Evolve dyno tested a base M5 on a Dyno Dynamics and made 631 rwhp, which is over 700 at the crank using the common 15% drivetrain loss. https://www.carscoops.com/2018/08/dy...mpetition/amp/

My guess is the Comp may have 1/2 psi more peak boost and the CS maybe 1 psi more than the base model. I tried a Comp tune in my base and noticed no difference. Have not tried a CS tune.