MB M256 3.0L Inline 6: 408HP/370ft/lb

[Xtrema]

http://jalopnik.com/mercedes-brings-back-the-inline-six-with-408-hp-and-mar-1788404634


The ISG is part of a 48 volt system, which drives an electric water pump, an electric AC compressor, and an electric auxiliary compressor that Mercedes calls an eZV. This means there’s no belt-driven accessory drive, reducing overall engine length—a godsend for an inherently long engine like an inline-six.

The electric compressor is basically a 48-volt turbo that crams air into the cylinders when the engine is at low RPMS and the big exhaust-driven turbo isn’t cutting it. Mercedes says the eZV accelerates to 70,000 RPM within 0.3 seconds, and that, between it and the ISG, this inline-six should get off the line quickly with “no turbo lag.”

[Redlined_8000]

Pretty cool having the electric turbo. Basically this car should feel supercharged. I am curious why they built this engine when they have their 3.0 V6 already?

[Xtrema]

Probably for NVH reason?

Still wonder how long a wheelbase a car need to be to get this. I would assume if they jam this in the C class, the front cup holders could be gone.

But if one is playing the numbers game, B9 RS4's electric turbo 3.0L V6 is expected to drop in at 450-500hp.

[blownz]

Originally posted by Redlined_8000
Pretty cool having the electric turbo. Basically this car should feel supercharged. I am curious why they built this engine when they have their 3.0 V6 already?

I read an article a while ago (year plus) that mentioned they were working on an inline 6 because their V6's couldn't match their V8's on NVH and customers would expect better as engine downsizing continues.

[rage2]

Originally posted by Xtrema
But if one is playing the numbers game, B9 RS4's electric turbo 3.0L V6 is expected to drop in at 450-500hp.
Well if you want to really play the numbers game, these aren't even AMG engines. ;)

This will be a direct replacement for the M276 engine, the 333-360hp V6 TT that was in the 400/450/43 across the MB lineup. The top range 400hp version will probably replace the 400hp M276 version that's going in the E43.

[Mitsu3000gt]

I read about all MB's new engines in a Motor Trend article the other day and they sound fantastic.

70,000 RPM in 0.3 seconds for the electric turbo :eek:

I read the standard 4.0TT V8 will have 476 HP / 516 TQ as well.

[01RedDX]

.

[rage2]

Originally posted by 01RedDX
No accessory belt due to all-electric ISG motor/generator/turbo/water pump/ AC compressor should help with length but they only mention the new S-class. However, the article says four engines, "gas and diesel inline-fours, gas and diesel inline-sixes and a gas V8" - so isn't that five new engines?
The diesel I4 came out last year in EU. The length of the M256 is comparable to a 4 cylinder with belt driven accessories :eek: so it should be a drop in replacement in other classes.