Mercedes-AMG 45 engine details revealed
06-06-19, 05:31 PM
#1
Mercedes-AMG 45 engine details revealed
All are hand-assembled like the big AMG engines
The Mercedes-AMG CLA 45, GLA 45 and A 45's new engine has been fully revealed, and is starting production. It will be available in two versions, a base one with 382 horsepower and 354 pound-feet of torque, and an S version making 416 horsepower and 369 pound-feet of torque. Peak horsepower for the base engine comes at 6,500 rpm and 6,750 rpm for the S engine. Peak torque comes pretty high in the rev range for both engines. In the base engine, it peaks from 4,750 rpm to 5,000 rpm, and in S engine it peaks from 5,000 to 5,250 rpm.
Those specs make this the most powerful production four-cylinder yet, and they come as a result of a seriously burly engine. It features an aluminum block with a closed-deck design for high strength. The steel crank and aluminum pistons are all forged. The turbocharger is a twin-scroll unit that takes advantage of an air-to-water intercooler setup and both port and direct fuel injection. The engine stays cool with both a primary radiator behind the grille and an auxiliary one behind one of the wheel wells.
The transmission shares the engine's cooling circuit and has its own heat exchanger mounted directly to it. Also interesting is the fact that the engine is oriented 180 degrees opposite its predecessor with the exhaust manifold and turbo facing the firewall. This apparently helps reduce the complex turns needed for intake and exhaust piping, and that presumably also improves gas flow. And like all of AMG's big V8s, each engine is assembled by one person's hands.
Those specs make this the most powerful production four-cylinder yet, and they come as a result of a seriously burly engine. It features an aluminum block with a closed-deck design for high strength. The steel crank and aluminum pistons are all forged. The turbocharger is a twin-scroll unit that takes advantage of an air-to-water intercooler setup and both port and direct fuel injection. The engine stays cool with both a primary radiator behind the grille and an auxiliary one behind one of the wheel wells.
The transmission shares the engine's cooling circuit and has its own heat exchanger mounted directly to it. Also interesting is the fact that the engine is oriented 180 degrees opposite its predecessor with the exhaust manifold and turbo facing the firewall. This apparently helps reduce the complex turns needed for intake and exhaust piping, and that presumably also improves gas flow. And like all of AMG's big V8s, each engine is assembled by one person's hands.
06-06-19, 05:57 PM
#3
Lexus Fanatic
If they are hand-assembled, good. 
That just means more people in the plants who are NOT going to have their jobs taken away by automation, cost-cutting, or forced-retirement.
That just means more people in the plants who are NOT going to have their jobs taken away by automation, cost-cutting, or forced-retirement.
06-06-19, 07:09 PM
#4
Lexus Fanatic
06-06-19, 07:41 PM
#5
Lead Lap
i'm bored of how ubiquitous the 4 cylinder turbo is already, but that much power from that small an engine must mean some exciting turbo lag!
i still don't really like the idea of 'entry level' and AMG being a thing, too much accessibility
i still don't really like the idea of 'entry level' and AMG being a thing, too much accessibility
06-06-19, 08:09 PM
#6
Lexus Fanatic
iTrader: (20)
06-06-19, 08:09 PM
#7
Lexus Fanatic
iTrader: (20)
416hp from a 4 cylinder engine is amazing. 
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06-06-19, 08:57 PM
#8
Lead Lap
06-06-19, 09:02 PM
#9
Lead Lap
06-06-19, 09:08 PM
#10
Lexus Fanatic
iTrader: (20)
Wasting my typing with you but A and B class didn’t exist when C class first had AMG treatment but i get you’re trying to protect your ego that plebeian A and B class vehicles might taint your old E55. 
But blistering fast rally cars have been fwd or AWD FF compact vehicles forever...
And amg is hardly only about ‘executive’ (snooty sedan) vehicles... in contrast there’s the amg gt.
But blistering fast rally cars have been fwd or AWD FF compact vehicles forever...
And amg is hardly only about ‘executive’ (snooty sedan) vehicles... in contrast there’s the amg gt.
06-06-19, 09:33 PM
#11
Lead Lap
lol they already did taint it, greed has won out again
the c-class (and it's predecessor) has always been aimed and engineered at a more upscale market, its FR nimble handling and feel actually give a reason to get one over like a V6 camry with similar power, but not so with the average a or b-class
an amg is also great not only because of how fast they are, but for the feeling of imperiousness that you get from driving one as a result of the massive power reserves available at basically any rpm the instant you press the pedal, and how effortlessly you can breeze past all the slow peasants in front of you... a 2 liter engine with peak torque at nearly 5000 rpm doesn't provide such an experience (i don't actually think of people with slower cars as peasants lol, i'm ok with people having different priorities than me)
and an amg gt is extremely snooty haha, it wouldn't look good pulling up in that car to tell someone you don't have their money yet
the c-class (and it's predecessor) has always been aimed and engineered at a more upscale market, its FR nimble handling and feel actually give a reason to get one over like a V6 camry with similar power, but not so with the average a or b-class
an amg is also great not only because of how fast they are, but for the feeling of imperiousness that you get from driving one as a result of the massive power reserves available at basically any rpm the instant you press the pedal, and how effortlessly you can breeze past all the slow peasants in front of you... a 2 liter engine with peak torque at nearly 5000 rpm doesn't provide such an experience (i don't actually think of people with slower cars as peasants lol, i'm ok with people having different priorities than me)
and an amg gt is extremely snooty haha, it wouldn't look good pulling up in that car to tell someone you don't have their money yet
06-07-19, 12:00 AM
#12
What you don't realize is that these new turbo engines have a flat torque curve. There is still a slight turbo lag, but many of them make near peak torque at 2000 rpm (or less) and the acceleration is near instant. Try some thing like a Kia Stinger and see what this instant response feels like. A modern 4.2 liter turbo V-8 is much faster everywhere than the old 5.5 liter NA engines. The AMG45 small cars can be blinding fast, but are not my cup of tea. An E class coupe with the 6.3 AMG engine is fantastic.
06-07-19, 07:55 AM
#14
Lead Lap
What you don't realize is that these new turbo engines have a flat torque curve. There is still a slight turbo lag, but many of them make near peak torque at 2000 rpm (or less) and the acceleration is near instant. Try some thing like a Kia Stinger and see what this instant response feels like. A modern 4.2 liter turbo V-8 is much faster everywhere than the old 5.5 liter NA engines. The AMG45 small cars can be blinding fast, but are not my cup of tea. An E class coupe with the 6.3 AMG engine is fantastic.
after the initial spooling the acceleration becomes almost monotone and boring since the torque constantly remains at 273... for the A45 to make that much more power from the same size engine must mean a bigger turbo that doesn't spool until later, otherwise it would seem the amg engineers are a bit underpaid
