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Old 12-22-2012, 03:38 PM
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krash krash is offline
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Location: PA
 
Join Date: Nov 2005
Posts: 2,657
Mein Auto: 2013 335i Sport Sedan
Quote:
Originally Posted by Jamesonsviggen View Post
I found that :

A-Real world, it's a decent gap in MPG. I took both cars and ran them on the same loop to compare, not 100% scientific but pretty close. I got 35.5 in the N55(8at) and 39 in the N20(6mt). I am pretty sure an N55 6mt might get a bit less than an 8at.
B-The power difference is not as large as advertised, both engines underrated, the 328 just more so. This has been shown on the dyno a handful of times.
I guess different people will interpret this differently. Only 3.5 MPG difference is really remarkable when considering that you get 45 lbs more max torque and 60 more HP with the 335.

You basically get 25% more HP with the N55, and the N20 only gives you less than 10% better gas mileage.

Now, with all that said, there is nothing wrong with the N20. It's a great engine, and I'd be perfectly happy with a 328.

Last edited by krash; 12-22-2012 at 08:18 PM.
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