Less horsepower??
Member
Joined: Nov 2004
Posts: 151
Likes: 0
From: Spring, in the Republic of Texas
SLK 55 AMG
Here's what the site says:
Serious rush. With more than 360 horsepower pumping from its V-8 engine and a 7-speed automatic transmission, this roadster provides serious sports car thrills in true AMG style.
AMG-built 5.5L SOHC 24-valve V8 engine - 355 hp @ 5,750 rpm
Serious rush. With more than 360 horsepower pumping from its V-8 engine and a 7-speed automatic transmission, this roadster provides serious sports car thrills in true AMG style.
AMG-built 5.5L SOHC 24-valve V8 engine - 355 hp @ 5,750 rpm
Super Member
Joined: Feb 2005
Posts: 641
Likes: 0
From: N.Attleboro,MA
Lamborghini Gallardo, Turbo, SLK 55, E350 4Matic, Xterra
hmm weird. Also have you noticed that the C55 has the same engine (if i'm not mistaken) as the slk55 and the c55 produced more hp?
might seem a little dumb but i wonder if it has anything to do with the computer? or if you could swap a c55 computer to the slk55 and get a boost?
might seem a little dumb but i wonder if it has anything to do with the computer? or if you could swap a c55 computer to the slk55 and get a boost?
Almost a Member!
Joined: Feb 2005
Posts: 32
Likes: 0
From: Valley Village, CA
SLK55, BMW 530, BMW M Roadster
I think the difference is that in Europe the horsepower rating is calculated differently than here in the U.S. In Europe the horsepower rating is around 360 while here in the U.S. the rating is 355. But the output is the same, just different methods of measurement. Sort of like liters and gallons.
Super Member
Joined: Jun 2004
Posts: 770
Likes: 0
From: Silicon Valley, CA
'93 RX-7, SLK55
Originally Posted by Shark
Perhaps it might have to do with minor differences in the exhaust system.
The Hp rating difference is not due to Europe having a different measuring system (or all Hp ratings would be different between the US & Europe on all cars AND there would also be a difference in the other 5.5L US based AMG cars vs thier Euro AMG cousins - it would not be limited only to the SLK55 - the Hp delta would be present in the other AMG cars).
-Matt
Member
Joined: Jul 2004
Posts: 142
Likes: 0
From: Newbury, UK
W210 E320, SLK55 AMG
The USA uses SAE Net Horsepower, Europe uses DIN (70020) horsepower. They are different measuring systems with a difference factor of 1.0139. More here:
http://neptune.spacebears.com/opine/horsepwr.html
At lower numbers, they are very similar. By the time you get to 360, the difference is starting to show. The UK generally uses BHP which is the same as SAE Net. Hence we also have 360bhp, but the magazines have been getting confused recently and have been publishing a mixture of 355 and 360 figures.
http://neptune.spacebears.com/opine/horsepwr.html
At lower numbers, they are very similar. By the time you get to 360, the difference is starting to show. The UK generally uses BHP which is the same as SAE Net. Hence we also have 360bhp, but the magazines have been getting confused recently and have been publishing a mixture of 355 and 360 figures.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Senior Member
Joined: Oct 2004
Posts: 265
Likes: 0
SLK55
Originally Posted by silk32
hmm weird. Also have you noticed that the C55 has the same engine (if i'm not mistaken) as the slk55 and the c55 produced more hp?
might seem a little dumb but i wonder if it has anything to do with the computer? or if you could swap a c55 computer to the slk55 and get a boost?
might seem a little dumb but i wonder if it has anything to do with the computer? or if you could swap a c55 computer to the slk55 and get a boost?
I think that because the car is in a different segment than the roadster the emissions or EPA mileage standards may be less restrictive in the larger car. This also occurs in the Audi A4 3.2 engine which is rated at 255HP while the TT is only rated at 250 HP.
Swapped ECU's should be the same part number, though.
Last edited by fredfromny; Apr 8, 2005 at 06:37 PM.
Super Member
Joined: Jun 2004
Posts: 770
Likes: 0
From: Silicon Valley, CA
'93 RX-7, SLK55
Originally Posted by fredfromny
I think that you are right-they are tuned differently. Because they both share the same platform I don't think it is the engine bay fitment.The length of the exhaust has little to do with this because a shorter exhaust is actually less restrictive.
I think that because the car is in a different segment than the roadster the emissions or EPA mileage standards may be less restrictive in the larger car. This also occurs in the Audi A4 3.2 engine which is rated at 255HP while the TT is only rated at 250 HP.
Swapped ECU's should be the same part number, though.
I think that because the car is in a different segment than the roadster the emissions or EPA mileage standards may be less restrictive in the larger car. This also occurs in the Audi A4 3.2 engine which is rated at 255HP while the TT is only rated at 250 HP.
Swapped ECU's should be the same part number, though.
Trust me, I drive a mid 11 sec car every day. Nobody is going to notice a miniscule 7 Hp (at the flywheel) drop in power. Its too small to notice & besides, the SLK55 weighs less than the N/A AMG sedans which offsets this small drop in power. Its just plain insignificant.
See ya,
-Matt
