AMG SLK55 vs SLK550 ?????????

hairypet55 · 06-20-2008

I've been wondering lately why the slk55 uses the hand built AMG 5.5L 24v motor which only puts out 355 hp/376 tq, when the plain vanilla non-AMG 5.5 L 32v motors puts out more power (around 380 hp/391 tq).

I love the slk55 cars, but shouldn't the AMG 55 be putting out more power (ignoring the black serires) with the hand built AMG motor.

Are there advantages to the AMG motor like lighter weight, durability, etc. Or is it that the 32v motor just doesn't fit in the SLK.

Just seems odd to me that now that the non-AMG V8 put out bigger numbers the AMG V8 in our cars?

Probably a dumb question, but I've put on my flame retardant suit......

Thanks.

**dsb** · 06-20-2008

That new engine is well... new. The SLK55 has a older engine. At least we have benefitted from years of development. Trust me. I owned one of the first SLK350 in '05. As a new engine, I suffered bad oil consumption. After a buyback, I got the 55. It might be old 3V technology, but it's still a performer.

hairypet55 · 06-20-2008

You're right. I'm just being greedy.

**F111F** · 06-21-2008

While a few more hp might be nice, my experience on the track is that the motor puts out plenty of hp, it is the fact that the AMG handles so well that makes up the difference. Of course, good driving skills adds to the hp also.

Jmjumper · 06-22-2008

Not to belabor the obvious, but the non AMG motor is able to breathe a little easier (4 valves per cyl vs our 55's 3 valves). That's going to make a distinct difference.

**Nevada Joe** · 07-23-2008

Quote:

Originally Posted by F111F

my experience on the track is that the motor puts out plenty of hp, it is the fact that the AMG handles so well that makes up the difference.

No intention of a thread hijack but i'm new to the forum here and can't send PM's yet.

What kind of track do you run on?

06-20-2008	#1 (permalink)
hairypet55 SLK World Member Join Date: Apr 2008 Location: S. Cal. Vehicle: slk55 Posts: 44 Country: Thanks: 6 Thanked 12 Times in 4 Posts	AMG SLK55 vs SLK550 ????????? I've been wondering lately why the slk55 uses the hand built AMG 5.5L 24v motor which only puts out 355 hp/376 tq, when the plain vanilla non-AMG 5.5 L 32v motors puts out more power (around 380 hp/391 tq). I love the slk55 cars, but shouldn't the AMG 55 be putting out more power (ignoring the black serires) with the hand built AMG motor. Are there advantages to the AMG motor like lighter weight, durability, etc. Or is it that the 32v motor just doesn't fit in the SLK. Just seems odd to me that now that the non-AMG V8 put out bigger numbers the AMG V8 in our cars? Probably a dumb question, but I've put on my flame retardant suit...... Thanks.

06-20-2008	#2 (permalink)
dsb Elite SLK World Member Join Date: Jul 2006 Location: NorCal Vehicle: '06 slk55 Posts: 1,176 Country: Thanks: 67 Thanked 122 Times in 42 Posts	That new engine is well... new. The SLK55 has a older engine. At least we have benefitted from years of development. Trust me. I owned one of the first SLK350 in '05. As a new engine, I suffered bad oil consumption. After a buyback, I got the 55. It might be old 3V technology, but it's still a performer. __________________ SOLD! 06 Mercedes Benz SLK55 Caspian Blue / Black & Ash *To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.*

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06-20-2008	#3 (permalink)
hairypet55 SLK World Member Join Date: Apr 2008 Location: S. Cal. Vehicle: slk55 Posts: 44 Country: Thanks: 6 Thanked 12 Times in 4 Posts	You're right. I'm just being greedy.

06-21-2008	#4 (permalink)
F111F Elite SLK World Member Join Date: Oct 2006 Location: Plano, TX Vehicle: SLK55 Black Mocha Designo Posts: 291 Country: Thanks: 39 Thanked 23 Times in 11 Posts	While a few more hp might be nice, my experience on the track is that the motor puts out plenty of hp, it is the fact that the AMG handles so well that makes up the difference. Of course, good driving skills adds to the hp also.

06-22-2008	#5 (permalink)
Jmjumper SLK World Member Join Date: Nov 2007 Location: Savannah, Georgia Vehicle: 08 SLK 55 AMG Other Toys: Mustang GT -modified Posts: 51 Country: Thanks: 1 Thanked 0 Times in 0 Posts	Not to belabor the obvious, but the non AMG motor is able to breathe a little easier (4 valves per cyl vs our 55's 3 valves). That's going to make a distinct difference.

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