Author Topic: 2023 Mercedes-AMG SL43 Gets A Four-Cylinder With An Electric Turbo  (Read 346 times)

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Offline cawimmer430

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2023 Mercedes-AMG SL43 Gets A Four-Cylinder With An Electric Turbo

Nearly six decades after the last four-cylinder SL rolled off the production line in 1963 and Mercedes is re-introducing a four-banger in its flagship roadster lineup in the form of the new 2023 Mercedes-AMG SL43.

Following the introduction of a pair of bi-turbocharged 4.0-liter V8s in the SL 55 4Matic+ and SL63 4Matic+ delivering 470-hp and 577-hp respectively in the R232-codenamed SL last year, the SL43 takes its place as the entry model of the 2+2 roadster range.

Powering the base SL is a new variant of AMG’s 2.0-liter four-cylinder M139 engine that uses an electric exhaust gas turbocharger, a technology derived from Formula 1 racing cars, which Mercedes claims a first for a production vehicle. The turbocharger is operated through a 48-volt electrical system that feeds the second-generation belt-driven starter-generator (RSG). Beyond providing a temporary boost in power, the system also works as a mild-hybrid allowing a gliding mode and energy recovery for increased efficiency.





The 2.0-liter unit that is positioned longitudinally in the SL 43 produces 375-hp (280 kW / 381 PS) at 6,750 rpm and 480 Nm (354 lb-ft) of peak torque between 3,250 and 5,000 rpm, plus an additional short-term boost of 13-hp (10 kW / 14 PS) from the belt-driven starter generator (RSG) in certain driving situations. For those of you counting horses, that’s notably less than the 2.0-liter turbo found in the A45 S and CLA 45 S, which is rated at an impressive 415 hp (310 kW / 421 PS) and 369 lb-ft (500 Nm) of torque making it currently the most powerful four-cylinder in production.

AMG’s 9-speed MCT automatic transmission drives the rear wheels only with the Germans claiming a 0-100 km/h (62 mph) acceleration time of 4.9 seconds and a top speed of 275 km/h (171 mph). As for fuel economy, in the combined WLTP cycle, the SL43 returns between 9.4 and 8.9 l/100km, which is the U.S. equivalent of 25.0-26.4 mpg.

Elsewhere, the base version of AMG’s fabric-top roadster comes fitted as standard with an AMG RIDE CONTROL steel suspension and an AMG DYNAMIC SELECT system with five driving modes, or six if you opt for the AMG DYNAMIC PLUS Package that adds “Race” to the existing “Slippery”, “Comfort”, “Sport”, “Sport +” and “Individual”. The optional Plus Package also throws in a few more goodies to the mix, including a 10mm lowered suspension, different engine mounts, an electronically controlled limited-slip rear differential and yellow brake calipers.





How can I tell it’s a four-cylinder SL?

Glad you asked. For those of you aspiring to be that guy pointing out the four-cylinder block under the hood when someone opts to delete the badging, the easiest way is to look at the back and spot the round instead of the angular double tailpipe trim found in the V8s. The SL 43 also runs on smaller 19-inch wheels as standard, but you can also get the larger 20 or 21 inch rims available in the eight-cylinder models as an option.

Speaking of extras, Mercedes hasn’t held back offering anything and everything from an active rear-axle steering (HAL) system that turns the rear wheels either in the opposite direction (up to 100 km/h or 62 mph) or in the same direction (faster than 100 km/h) as the front wheels and MANUFAKTUR individual colors, to all sorts of packages like the exterior Carbon and high-gloss chrome kits.





Will it come to North America?

We’re not sure yet, but we wouldn’t be surprised if Mercedes kept it out of the USA, as there’s a stigma against four-cylinder engines in higher-end sports and luxury cars, especially at this price point. Still, we’ve reached out to Mercedes and will update this story if and when they get back to us. As for the European market, Mercedes will communicate availability and pricing details at a later stage.

Beyond the SL43, Mercedes-AMG is also working on a plug-in hybrid variant of the R232 that could be called the SL63 E-Performance featuring the same powertrain as the AMG GT 63 E Performance that combines a twin-turbocharged 4.0-liter V8 with an electric motor making a massive 831 hp (842 PS/620 kW) and 1,023 lb-ft (1,400 Nm) of torque.











Link: https://www.carscoops.com/2022/04/new-entry-level-2023-mercedes-amg-sl43-gets-a-375-hp-four-cylinder-with-an-electric-turbocharger/
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Offline veeman

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Re: 2023 Mercedes-AMG SL43 Gets A Four-Cylinder With An Electric Turbo
« Reply #1 on: April 08, 2022, 08:09:10 pm »
Watching the video of the woman driving it, it looks like kids could easily fit comfortably in the backseat (at the 37 second mark of the video) which makes it a much more useful car for wealthy parents.  It looks good to.

I don’t think people in the U.S. care any longer the number of cylinders in their luxury cars, particularly small sedans/coupes/convertibles. 

Offline cawimmer430

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Re: 2023 Mercedes-AMG SL43 Gets A Four-Cylinder With An Electric Turbo
« Reply #2 on: April 09, 2022, 03:04:35 am »
I don’t think people in the U.S. care any longer the number of cylinders in their luxury cars, particularly small sedans/coupes/convertibles. 

I was just thinking back to the R129 SL in which the lower end models (inline-6 and V6s) were basically lethargic and slow. There are a lot of 6-cylinder R129 owners in the club I am in and they will admit that these cars are cruisers, but leisurely in acceleration (basically nothing sporty about them). The succeeding R230 and R231 models improved this, particularly in the R231 where the base model V6 offered performance which blew away the R230 SL500.

Here, the SL43 offers performance (0-100 km/h in 4.9 seconds) which comes close to the R231 SL500 (0-100 km/h in 4.5 seconds) while getting better fuel economy. I wonder if the SL43 also has some handling advantages due to the engine being lighter than the inline-6 and the V8 SLs.
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Offline FoMoJo

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Re: 2023 Mercedes-AMG SL43 Gets A Four-Cylinder With An Electric Turbo
« Reply #3 on: April 09, 2022, 07:59:41 am »
I don’t think people in the U.S. care any longer the number of cylinders in their luxury cars, particularly small sedans/coupes/convertibles. 
Could be that many/most of them don't really know what cylinders are.
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Offline veeman

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Re: 2023 Mercedes-AMG SL43 Gets A Four-Cylinder With An Electric Turbo
« Reply #4 on: April 09, 2022, 10:40:58 am »
I was just thinking back to the R129 SL in which the lower end models (inline-6 and V6s) were basically lethargic and slow. There are a lot of 6-cylinder R129 owners in the club I am in and they will admit that these cars are cruisers, but leisurely in acceleration (basically nothing sporty about them). The succeeding R230 and R231 models improved this, particularly in the R231 where the base model V6 offered performance which blew away the R230 SL500.

Here, the SL43 offers performance (0-100 km/h in 4.9 seconds) which comes close to the R231 SL500 (0-100 km/h in 4.5 seconds) while getting better fuel economy. I wonder if the SL43 also has some handling advantages due to the engine being lighter than the inline-6 and the V8 SLs.

Could be that many/most of them don't really know what cylinders are.

It seems to me that a decade or more ago, a 4 cylinder was usually too noisy and slow for a proper luxury car but that's no longer the case for smaller cars and probably for larger cars/SUVs too if mixed with some sort of hybrid set up. 

Yeah it's plenty fast enough for a cruiser.  No one tracks these cars.   

I don't know how many people who buy these sort of cars know how many cylinders they have or other details of the engine.  Anecdotally during small talk at parties most of the guys would probably know that but these are usually 40 plus year old men and not 20 year olds. 

Offline Galaxy

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Re: 2023 Mercedes-AMG SL43 Gets A Four-Cylinder With An Electric Turbo
« Reply #5 on: April 09, 2022, 12:01:34 pm »
That blue color though!  :wub:

Offline cawimmer430

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Re: 2023 Mercedes-AMG SL43 Gets A Four-Cylinder With An Electric Turbo
« Reply #6 on: April 09, 2022, 12:27:21 pm »
I'm always impressed with the NVH qualities of my 2018 A250. I'm telling you it's as smooth as an inline-6; absolutely insane how they managed to balance it so well. When I accelerate at low speed, there's also no "typical 4-cylinder sound", it's more like a "swooooooosh" sound. Absolutely love this engine.  :wub:

I'm expecting the 4-cylinder in the SL43 to be even better, if that is even possible at this point.

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Offline r0tor

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Re: 2023 Mercedes-AMG SL43 Gets A Four-Cylinder With An Electric Turbo
« Reply #7 on: April 16, 2022, 07:37:24 am »
I miss the SL being a compact 2 seater.

Kind of funny now that "F1" electric turbo tech is starting to finally hit the streets (well somewhat), the FIA decides to abolish it.
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Offline Laconian

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Re: 2023 Mercedes-AMG SL43 Gets A Four-Cylinder With An Electric Turbo
« Reply #8 on: April 16, 2022, 12:13:48 pm »
It seems to me that a decade or more ago, a 4 cylinder was usually too noisy and slow for a proper luxury car but that's no longer the case for smaller cars and probably for larger cars/SUVs too if mixed with some sort of hybrid set up. 

Yeah it's plenty fast enough for a cruiser.  No one tracks these cars.   

I don't know how many people who buy these sort of cars know how many cylinders they have or other details of the engine.  Anecdotally during small talk at parties most of the guys would probably know that but these are usually 40 plus year old men and not 20 year olds. 

Four cylinders are miserable for onlookers, though. Sporty dual "exhausts" with a tepid "breppppppppppppppp" coming out of only one of the orifaces.
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Offline cawimmer430

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Re: 2023 Mercedes-AMG SL43 Gets A Four-Cylinder With An Electric Turbo
« Reply #9 on: April 20, 2022, 07:03:20 am »
Four cylinders are miserable for onlookers, though. Sporty dual "exhausts" with a tepid "breppppppppppppppp" coming out of only one of the orifaces.

I love the “fake sporty engine noises” pumped into my interior when I switch to SPORT MODE. :lol:
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