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New Mercedes 4-Cylinder Diesel Engine

 New Mercedes 4-Cylinder Diesel Engine
New Mercedes 250 CDI engine

204 hp with 500 Nm of torque

Mercedes is on a quest to deliver greater power, economy and cleanliness with fewer cylinders. Today the German marque has taken another step forward with their new 2.1 liter CDI diesel engine, producing 204 hp with 500 Nm of torque while consuming just 5.4 liters per 100 km.

Mercedes celebrates the 150th anniversary of Rudolf Diesel's birthday, and what better way to honor the man who invented the diesel engine in 1893, six years after Daimler and Benz invented the automobile, then with a new engine. Rudolph Diesel died in 1913 and the first diesel engine made its world debut in 1936 as the legendary 260 D.

The new diesel, which will be known as the 200 CDI, 220 CDI and 250 CDI has 2143 cubic centimeters of displacement and is capable of producing 150 kW / 204 hp of power with 500 Nm of torque in its most potent level. Thats 20% more power and 25% more torque than the outgoing engine. CO2 emissions are also cut by up to 13% which ensures that the engine is Euro5 emissions standard approved already.

The new engine will debut in 2008 in the C-Class, can be installed transversely and longitudinally, is expected to power all-wheel-drive cars and of course BlueTec technology can be supplemented too. This engine will scream from 0 to 100km/h in 7.7 seconds if placed in a C-Class saloon by fully deploying its two turbochargers. The two-stage turbocharging should take care of the notorious 'turbo-lag' on a single turbocharged engines.

Here is a short overview of the new engine:

  250 CDI 220 CDI 200 CDI
Number of cylinders 4 4 4
Valves per cylinder 4 4 4
Displacement, cc 2143 2143 2143
Bore/stroke, mm 83.0/99.0 83.0/99.0 83.0/99.0
Compression ratio 16.2:1 16.2:1 16.2:1
Output, kW/hp 150/204 at 4200 rpm 125/170 at 3200 -4800 rpm 100/136 at 3000 -4600 rpm
Torque, Nm 500 at 1600 - 1800 rpm 400 at 1400 - 2800 rpm 330 at 1600 - 2800 rpm *)

Full details can be found in the attached press release and subsequent pages.

Source: Daimler AG
Published Apr 10, 2008 10:02 am By Frank de Leeuw van Weenen
Posted in:

New generation of four-cylinder diesel engines from Mercedes-Benz leads the way: Taking performance, consumption and emissions into a new dimension

What better way to mark the 150th anniversary of Rudolf Diesel's birth than a brand new generation of four-cylinder diesel engines from Mercedes-Benz which outstrip all previous benchmarks for performance, torque, emission properties and, most notably, fuel economy in their segment? In its most powerful variant, the new four-cylinder unit musters up 150 kW/204 hp from its 2143 cubic centimetres, meaning that it delivers around 20 per cent more power than the engine it replaces. At the same time, peak torque has risen from 400 Nm to 500 Nm, equating to an increase of 25 per cent. Despite the 25 kW increase in output, the new four-cylinder diesel burns substantially less fuel than its predecessor, which was itself highly economical. As a consequence, CO2 emissions are reduced by as much as 13 per cent and the new four-cylinder diesel unit already complies with the future EU5 emissions standard.

The new four-cylinder diesel generation from Mercedes-Benz can be briefly summed up as follows: greater power, greater economy, greater cleanliness. The new power unit from the Untertürkheim plant needs to be explained at greater length to be fully appreciated, however. It really does charter territory from which diesel engines - and four-cylinder units particularly so - have previously been excluded. It redefines standards for power output and torque on the one hand and for fuel consumption and exhaust emissions on the other, setting benchmark figures which no other comparable series-production engine is able to match at the current time.

The technical advance which the design engineers at Mercedes-Benz have achieved with this new four-cylinder diesel is not only evident on paper, its effects can also be experienced to an intense degree behind the wheel. As far as the figures are concerned, the most powerful variant of the new diesel engine extracts 150 kW/204 hp from its displacement of 2143 cubic centimetres. This represents an increase of some 20 per cent compared to its predecessor, despite the displacement being almost identical. Meanwhile, the engine's peak torque has been upped by 25 per cent from 400 Nm to 500 Nm. The power-to-displacement and torque-to-displacement ratios of the new engine from Untertürkheim make just as impressive reading, with figures of 70 kW/95.2 hp and 233.3 Nm per litre respectively (the figures for its predecessor by comparison: 58.2 kW/79.2 hp and 186.2 Nm per litre of displacement).

Lower fuel consumption despite substantial gain in output

The engineers also took care to ensure the new diesel engine is a paragon of
fuel efficiency. In spite of the substantial power boost of 25 kW, the engine makes even more frugal use of diesel than its predecessor, which was itself a most modest consumer of fuel. This is immediately apparent from the fuel consumption figures for the C-Class, in which the powerpack will be making its debut in the autumn. When fitted in the C-Class, the new 150-kW unit burns just 5.4 litres of diesel per 100 kilometres (NEDC), 0.5 litres less than previously. And when powered by the 125-kW/170-hp variant that is also newly available, the C Class returns even lower fuel figures of 5.1 litres for every 100 kilometres (a drop of 0.8 litres). As a consequence, CO2 emissions are reduced by 8 and 13 per cent respectively to 143 and 136 g/km. The Mercedes-Benz engineers have also succeeded in further reducing the amount of untreated engine emissions. Even without an active denoxification process, the new four-cylinder diesel already meets the future EU5 emissions standard.

"This takes our new four-cylinder unit into a realm which has so far been the preserve of three-litre six-cylinder diesel or large V8 petrol engines - all combined with exemplary fuel economy," commented Dr. Thomas Weber, who is responsible for Group Research and Development at Mercedes-Benz Cars on the Daimler AG Board of Management.

Tangible progress and intense motoring pleasure

Drivers are able to savour the advances that have been made with all of their senses. The new drive unit has a powerful feel to it, its response is agile, it delights with its tremendous pulling power and impresses with admirable levels of smoothness for a four-cylinder engine. It enables sports-car-like performance, propelling the C-Class Saloon from standstill to the 100-km/h mark in a mere 7.7 seconds. The engine's supreme flexibility permits quick turns of speed for rapid overtaking on country roads, taking just 9.4 seconds to pick up from 60 to 120 km/h. This all adds up to a high degree of fun at the wheel combined with great economy.

Quite apart from its outstanding power output data, the new drive unit also boasts markedly superior torque build-up from low revs compared to the engine it replaces, along with a class-beating torque characteristic curve. This means that the engine can be run extremely economically at low rev speeds in routine driving situations.

The new diesel engine is set to supersede four different powerplants in all, and will be fitted in a number of variants across a wide range of model series, even including the Mercedes-Benz Sprinter. Thanks its high power potential it has been possible to apply the downsizing principle, where smaller engines with fewer cylinders are used in order to lower fuel consumption very effectively. Thanks to the agility, pulling power and optimum running characteristics of the new diesel drive unit, the vehicles it is fitted in will continue to be able to live up to the high standards of comfort and motoring pleasure expected of models from Mercedes-Benz. Three different variants are initially planned for use in passenger cars.

The key data

  250 CDI 220 CDI 200 CDI
Number of cylinders 4 4 4
Valves per cylinder 4 4 4
Displacement, cc 2143 2143 2143
Bore/stroke, mm 83.0/99.0 83.0/99.0 83.0/99.0
Compression ratio 16.2:1 16.2:1 16.2:1
Output, kW/hp 150/204 at 4200 rpm 125/170 at 3200 -4800 rpm 100/136 at 3000 -4600 rpm
Torque, Nm 500 at 1600 - 1800 rpm 400 at 1400 - 2800 rpm 330 at 1600 - 2800 rpm *)

*) with automatic transmission

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Comments (35)

 MarkoKaraula MarkoKaraula
I bought a Mercedes 2008 years model c220D 125kW AMG with equipment from an authorized dealer in Croatia. Three days ago we broke the engine crankshaft, and now I have damage from 15,000 euros a car has 80 000 km .... Mercedes is shit... i pay car 60 000 euros... MERCEDES never more....... NEVER.....
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October 17, 2011 1:28 pm
 NewMexicoUSA NewMexicoUSA
This engine sounds like a great replacement for the original inline-6 in my 1977 Datsun 280Z. Maybe I can run it on vegetable oil after warmup.
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April 20, 2008 3:52 am
 djcocum djcocum
How cool!! This engine as exactly the same power figures as the 123d: 204HP. Isn't that suspicious?
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April 16, 2008 12:31 am
 benz_man benz_man
More so now than in the past Mercedes, BMW and Audi share many of the same Tier 1 suppliers with the EXACT same hardware. The differences in the product being in the software. To state that one is "the king" or "generations ahead" is ludicrous now. I'm astonished to see manufacturers pulling such high HP and TQ numbers from such small engine sizes. Engine efficiency is WAY up and the consumer gets the prize. Good power, good fuel mileage, clean emissions! Radmeister, you're spot-on. The Tq curve is a little peaky for an oil-burner, but thats only to be expected of such a small engine. However, most (more than 50%) of it is available just off idle. Which, combined with a small, high pressure engine that revs quickly (for a diesel) and the correct gearing (how can you mess up with 7 ratios?) has the potential be just about perfect. lol
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April 14, 2008 10:18 am
 realmman1 realmman1
LETS SEE LIGHTER,MORE HORSEPOWER,MORE TORQUE,LESS CU. IN.,COOLER ENGINE TEMP.,NO TURBO LAG, SEEMS NONSENCE TO TALK ABOUT SMALL TORQUE BAND WIDTH.what do you want an F-50?
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April 14, 2008 7:03 am
 Bremen_Koenigsegg Bremen_Koenigsegg
You need to consider everyday driving conditions. The engine produces 400+ N-m (within 20% of upper limit) from ~1300 to ~3300 RPM, which is pretty nifty.
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April 13, 2008 11:47 pm
 norther norther
so what if they were selliing diesels in the 30s? u mean to say even those were better than the current TDIs? :)))).... and the bluetec technology, is one of the lamest. personaly, i dont like any hybrid.
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April 13, 2008 10:30 pm
 norther norther
wow. new engine from mercedes (finally). how exciting. and would you look at their names 200, 220, 250...but wait, they have the same CC. damn they're smart. SD-AMG, i think mercedes are 2-3 engine generations behind VW/AUDI. they didn't built anything new..since...since....well, heck nows. and despite the 201 BHP (careful boys 200 AND ONE bhp) i doubt it's better than a 2.0 TDI 170 bhp. come on now, everybody knows TDI is king in the diesel world. i just cant imagine how stupid it sounds, saying: "uuu, ive got the new 220/250 cdi...and its a 2 L". when's mb gonna drop this crap
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April 12, 2008 11:34 pm
 realmman1 realmman1
Lighter,faster,smaller,better mpg,7-speed auto or paddle shifters,multi clutches,I don't think we need to worry about short torque bands!!!
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April 12, 2008 4:31 am
 ussoleg ussoleg
Put this motor in the new C-class and ship it to US !!! Please !!!
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April 11, 2008 5:18 pm
 radmeister radmeister
Very very short torque band.. What's the point of 500nm when you only have it across 200rpm?
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April 11, 2008 4:22 pm
 unknown unknown
wow the mechanical and electrical on this engine looks like a nightmare to work with!
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April 11, 2008 1:39 am
 Alex_011 Alex_011
It is pretty stupid to argue who is better, who have more power, Nm, bla, bla, bla... Every of "golden three" (how I call Mercedes, BMW and Audi) have their own place in diesel history, and every of them have its own period of time when it has slightly "better" diesel engine or engines, with a little bit more horse power or torque... I very welcome every effort of those three giants to bring new, fresh, better diesel engines... Competition is the best thing for us, costumers... Mercedes is, and it always be, extremely important in diesel engine market. For good connoisseur of automotive industry there is no need to talk about that...
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April 11, 2008 12:01 am
 german-cars-lover german-cars-lover
(( Mercedes celebrates the 150th anniversary of Rudolf Diesel's birthday )) That's great .. Germany is great !!
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April 10, 2008 10:08 pm
 Akrion Akrion
SD-AMG - You must be kidding right? Care to share some information of how Audi is copying MB? That would be very entertaining as well. Statement like that would need to be backed up by some facts right? Or its just your humble opinion?
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April 10, 2008 8:41 pm
 Akrion Akrion
ght - what a great argument !
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April 10, 2008 8:38 pm
 SD-AMG SD-AMG
"TDI technology and Audi/VW are by far on the top when it comes to diesel!" - yeah right, who is copying who with the Bluetec technology? ;)
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April 10, 2008 8:37 pm
 bmw_xxx bmw_xxx
BMW 318d 143 hp, 300 Nm, 1995cc³, 4 cylinders BMW 320d 177 hp, 350 Nm, 1995cc³, 4 cylinders BMW 323d 204 hp, 420 Nm, 1995cc³, 4 cylinders (August 2008)
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April 10, 2008 8:31 pm
 pscs pscs
sounds good, especially they've made 3 engines out of 1. WCF you forgot to put the fuel consumption on the table...
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April 10, 2008 6:07 pm
 Joe_Limon Joe_Limon
How can they quote fuel consumption numbers? They will vary drastically according to the car they put it in.
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April 10, 2008 5:51 pm
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