Mx40i vs x40i prefix motor differences?

B58 _gran_coupe_ · 04-02-2022, 10:29 AM

What are the differences in power output between the 'M' prefix b58 cars due to? They seem to claim 380ish vs the regular x40i cars which claim 320 ish?

Is it just the tune or are there more differences?

Wires · 04-02-2022, 12:34 PM

Quote:

Originally Posted by B58 _gran_coupe_

What are the differences in power output between the 'M' prefix b58 cars due to? They seem to claim 380ish vs the regular x40i cars which claim 320 ish?

Is it just the tune or are there more differences?

There is more differences. If you check YouTube, there was a video explaining the variants of the B58 engine and what changed between first gen B58, 2nd gen, and M.

G.Newt · 04-02-2022, 01:09 PM

Quote:

Originally Posted by B58 _gran_coupe_

What are the differences in power output between the 'M' prefix b58 cars due to? They seem to claim 380ish vs the regular x40i cars which claim 320 ish?

Is it just the tune or are there more differences?

First gen B58's (F3x and F2x) 340i/440i/M240i all had 320-330hp.
2nd Gen B58's (G chassis) M340/M440i/M240i make 382hp.

B58 _gran_coupe_ · 04-02-2022, 06:34 PM

Quote:

Originally Posted by Wires

There is more differences. If you check YouTube, there was a video explaining the variants of the B58 engine and what changed between first gen B58, 2nd gen, and M.

Quote:

Originally Posted by G.Newt

First gen B58's (F3x and F2x) 340i/440i/M240i all had 320-330hp.
2nd Gen B58's (G chassis) M340/M440i/M240i make 382hp.

Thanks both I watched some vids and get it now, it's gen 1 vs gen 2 thanks!

Yam_440i · 04-03-2022, 06:33 AM

Gen 2's are deemed to be better in terms of making power due to the revisions made internally. As stated they make more power out the box and I think they have more potential on stock internals for max bhp.

I own a Gen 1and I'm not planning on making 800whp so in grand scheme of things, it shouldn't matter too much for me personally. A stage 2 tune or at the very most a set of hybrids will be enough.

Skyhigh · 04-03-2022, 06:44 AM

Quote:

Originally Posted by G.Newt

First gen B58's (F3x and F2x) 340i/440i/M240i all had 320-330hp. Optionally 360hp with M Performance package (different exhaust and tune, same engine).
2nd Gen B58's (G chassis) M340/M440i/M240i make 382hp.

Correction above in red.

04-02-2022, 10:29 AM	#1
B58 _gran_coupe_ Lieutenant 642 Rep 565 Posts Drives: F36 440i Odin Tuned DAW turbo Join Date: Mar 2022 Location: South West Florida iTrader: (0)	Mx40i vs x40i prefix motor differences? What are the differences in power output between the 'M' prefix b58 cars due to? They seem to claim 380ish vs the regular x40i cars which claim 320 ish? Is it just the tune or are there more differences?
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04-03-2022, 06:33 AM	#5
Yam_440i First Lieutenant 88 Rep 352 Posts Drives: White BMW 335i convertible Join Date: Apr 2018 Location: London iTrader: (0)	Gen 2's are deemed to be better in terms of making power due to the revisions made internally. As stated they make more power out the box and I think they have more potential on stock internals for max bhp. I own a Gen 1and I'm not planning on making 800whp so in grand scheme of things, it shouldn't matter too much for me personally. A stage 2 tune or at the very most a set of hybrids will be enough.
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