[BrodyShuffles]

I know this has been discussed before but I haven't seen anything new posted. Pros and cons of both would be appreciated. Steering comparison of the two. Handling, power, weight, modifications, reliability, etc. xDrive vs RWD. This isn't a N55 vs B58 post. I'm not looking for comparisons on just the motors. Just an overall N55 335i vs B58 340i thread. Thank you hoping to hear all opinions. Let's hear it.

[bacon_45]

Not comparing motors, which just alone would make the 340i a much better option.The 340i is an updated version of the 335i, not much changed. Just newer.

[neonnblack]

They're essentially the same. Lights are LED... some interior is slightly different like the hvac lighting.

The only big thing that's different is the motor. So it kind of is n55vb58 and b58 wins hands down.

[neonnblack]

Braking, steering, suspension same.

[BrodyShuffles]

Originally Posted by neonnblack

Braking, steering, suspension same.

Originally Posted by bacon_45

Not comparing motors, which just alone would make the 340i a much better option.The 340i is an updated version of the 335i, not much changed. Just newer.

Originally Posted by neonnblack

They're essentially the same. Lights are LED... some interior is slightly different like the hvac lighting.

The only big thing that's different is the motor. So it kind of is n55vb58 and b58 wins hands down.

Originally Posted by neonnblack

Braking, steering, suspension same.

That's what I've read. I own an N54 135i right now. I'm just trying to get all the opinions I can on whether to get the N55 or B58 or just keep my car. All I would do is a tune and exhaust. Not looking for crazy power or anything like that. I've read mixed answers on reliability of the B58 also. Just looking for overall comparisons of the two cars as a whole.

[Eddien123]

B58 is the better motor as it should be. N55 is incredibly reliable for the decent power it makes. If your goal is tuning then b58. If you're going to keep the car in stock form then save the money and go with an N55 car.

Cars are basically the same.

[danperson1]

340i apparently has many updates to the suspension and steering to make it slightly better handing.

335i is a better value

340i is better power and (slightly) better handling

https://www.caranddriver.com/reviews...-drive-review/

[johnung]

Originally Posted by Mason1327

I know this has been discussed before but I haven't seen anything new posted. Pros and cons of both would be appreciated. Steering comparison of the two. Handling, power, weight, modifications, reliability, etc. xDrive vs RWD. This isn't a N55 vs B58 post. I'm not looking for comparisons on just the motors. Just an overall N55 335i vs B58 340i thread. Thank you hoping to hear all opinions. Let's hear it.

The two platforms are so close that you really need to look at specific cars that are for sale and decide what is really important to you. If it's price then you'll find less expensive 335's. If it's mileage then you'll find 340's with less miles. Then there are other features. We can't live without safety driving features, heads up display, keyless start/entry, M Sport body, M Sport brakes, H/K audio, and maybe adaptive suspension. Color combinations?
Test drive some cars, focus on prioritizing the features that you want and the right car will find you.

[BrodyShuffles]

Originally Posted by johnung

The two platforms are so close that you really need to look at specific cars that are for sale and decide what is really important to you. If it's price then you'll find less expensive 335's. If it's mileage then you'll find 340's with less miles. Then there are other features. We can't live without safety driving features, heads up display, keyless start/entry, M Sport body, M Sport brakes, H/K audio, and maybe adaptive suspension. Color combinations?
Test drive some cars, focus on prioritizing the features that you want and the right car will find you.

That's a good point there's things I like more about one and things about the other. Unfortunately I prefer the way the Xenons look compared to all four bulbs lit in the LED's in the 340i but that shouldn't be a make or break. I guess the 16' B58 is holding up well even with a tune?

[johnung]

Originally Posted by Mason1327

That's a good point there's things I like more about one and things about the other. Unfortunately I prefer the way the Xenons look compared to all four bulbs lit in the LED's in the 340i but that shouldn't be a make or break. I guess the 16' B58 is holding up well even with a tune?

Either car will be great with a BootMod3 Stage1 flash tune and a rear axle back Performance exhaust from BMW MP, AWE, Remus, or several more. The N55 should upgrade its plastic charge pipe which is a known weak design that likes to crack at its 90 degree bend. Evolution Raceworks makes the best fitting, highest quality aluminum charge pipe. No issues!

BM3 gives you lots of control over exhaust burbles, pops, etc to make it as loud or quiet as you like. BM3 also includes a really nice automatic transmission tune.

If you ever want to upgrade to BootMod3 Stage2 flash tune. it's just a $50 additional unlimited multitune fee plus $100 for NGK colder plugs. Either engine would then need a high flow catted (Fabspeed HJS catted is the best with guaranteed no Check Engine Lights) or catless downpipe. N55 would also need a front mounted (air to air) intercooler upgrade. B58 uses a water-cooled intercooler so no intercooler upgrade is necessary. If temperature ever becomes an issue with B58 mods there are larger radiators for more cooling capacity but not usually needed.

So very simple upgrades for either engine to add an exhaust and tune that you said you would want. Hope this helps!

[Jake From State Farm]

Originally Posted by Mason1327

I know this has been discussed before but I haven't seen anything new posted. Pros and cons of both would be appreciated. Steering comparison of the two. Handling, power, weight, modifications, reliability, etc. xDrive vs RWD. This isn't a N55 vs B58 post. I'm not looking for comparisons on just the motors. Just an overall N55 335i vs B58 340i thread. Thank you hoping to hear all opinions. Let's hear it.

I love my 335i and the proven reliability, sound and tuning capability of the N55. Plus mine is a tractor, great low end power with nothing up top over 5K rpm (PWG)

You cannot go wrong with either IMHO but if you are able to go with the 340i that’s what I would do. The B58 is an awesome new platform that no doubt will be all of the above that I mentioned with the N55.

Good luck though, this is a nice predicament to be in.

[neonnblack]

Been 8k miles or so tuned on my b58 and it's doing great. Catless, mhd 2.

You don't need a cat upgrade though... stage 1 mhd(better imo for a few reasons, mainly data logging) or bm3 is for bone stock vehicles. Also plugs aren't really a needed thing unless you're wanting 500+ in the b58.

[IAmATeaf]

If I was buying right now it would have to be a 340i but I have noticed that they seem to be specced less than the 335i, certainly in the UK. Most for sale here don’t even have pro nav which is just crazy.

[Feddersen]

The adaptive suspension should be improved in the 340i over the 335i.

I have a 335i with the N55 with MPPK (326hp/450nm) and my wife has the M240i with the B58 (340hp/500nm). Both automatic. On paper there shouldn't be the big difference. BUT! The N55 drivetrain is really nice but the drivetrain of the B58 is just so much better and feels so much stronger. I can even feel it in the passenger seat of the M240i.

[ctbear]

Originally Posted by johnung

Either car will be great with a BootMod3 Stage1 flash tune and a rear axle back Performance exhaust from BMW MP, AWE, Remus, or several more. The N55 should upgrade its plastic charge pipe which is a known weak design that likes to crack at its 90 degree bend. Evolution Raceworks makes the best fitting, highest quality aluminum charge pipe. No issues!

BM3 gives you lots of control over exhaust burbles, pops, etc to make it as loud or quiet as you like. BM3 also includes a really nice automatic transmission tune.

If you ever want to upgrade to BootMod3 Stage2 flash tune. it's just a $50 additional unlimited multitune fee plus $100 for NGK colder plugs. Either engine would then need a high flow catted (Fabspeed HJS catted is the best with guaranteed no Check Engine Lights) or catless downpipe. N55 would also need a front mounted (air to air) intercooler upgrade. B58 uses a water-cooled intercooler so no intercooler upgrade is necessary. If temperature ever becomes an issue with B58 mods there are larger radiators for more cooling capacity but not usually needed.

So very simple upgrades for either engine to add an exhaust and tune that you said you would want. Hope this helps!

What's the average hp/torque gain with stage 1 tune on an N55 EWG?

[Blubaron79]

I had the final version of the N55 with the power kit on my 2015 335. Then I hopped into a 2018 340 with power and sound kit.

Differences were noticeable in power and torque band, but both were enough power. I wouldn't go any later than a late than a 2014 335. Both engines are adequate.

[johnung]

Originally Posted by Blubaron79

I had the final version of the N55 with the power kit on my 2015 335. Then I hopped into a 2018 340 with power and sound kit.

Differences were noticeable in power and torque band, but both were enough power. I wouldn't go any later than a late than a 2014 335. Both engines are adequate.

Excellent point! The N55 in the 335 was updated starting with build dates in July 2013 (so starting sometime during the 2014 model year.) Upgrades included a higher capacity turbo, a larger 4" downpipe (instead of 3.5") and an electronic wastegate (EWG). So more power and more reliability.

[johnung]

Originally Posted by ctbear

What's the average hp/torque gain with stage 1 tune on an N55 EWG?

There are lots of threads that you can search for where guys have posted dyno runs after installing BootMod3. Don't get too hung up on numbers. Bottom line is that the BootMod3 N55 EWG Stage1 is a powerful smooth running tune.

My car came with BMW's MPPK tune. When I flashed the BootMod3 tune, it saved the MPPK tune and then replaced it. BootMod3 tune was clearly superior in power and equally as smooth. Later the BootMod3 automatic transmission tune was released and it was a big improvement over stock transmission shifting.

[johnung]

Originally Posted by Feddersen

The adaptive suspension should be improved in the 340i over the 335i.

I have a 335i with the N55 with MPPK (326hp/450nm) and my wife has the M240i with the B58 (340hp/500nm). Both automatic. On paper there shouldn't be the big difference. BUT! The N55 drivetrain is really nice but the drivetrain of the B58 is just so much better and feels so much stronger. I can even feel it in the passenger seat of the M240i.

Curious if there is a weight difference between the two cars that may be contributing. Also is the gearing and final drive ratio the same?

[435gc]

According to consumer reports 2019 auto reviews. The 2015 435 has the highest reliability ratings of any BMW rated. Thats what steered me there. Will be interested to see if that changes when the 2020 reviews come out.

[Feddersen]

Originally Posted by johnung

Curious if there is a weight difference between the two cars that may be contributing. Also is the gearing and final drive ratio the same?

The 2-series is lighter but even if we put two persons into the M240i which is about the same as the difference it feels much stronger.

The gearing and the final drive ratio is also different. This was one of the big changes of going from N55 to B58. The reason should apparently be a smoother drive train.

[upsidedownfunnel]

The only real difference between the cars is the engine. IMO, after test driving a few F30 340i models (all M Sport, 6MT, with/without THP), while the suspension is tuned slightly differently, the difference is very small. Both cars need a suspension upgrade regardless. Steering is essentially the same, both are typical modern BMW artificially stiff in sport mode with no feel in any mode. There simply are no significant interior or exterior updates other than the tail lights.

You could save some money and get a 335i (EWG 2014+) with about $800-$1000 to tune your car and install some small supporting mods. I'm fairly sure an N55 car with a stage 1 Bootmod3 tune is at least as fast as a B58 if not faster. The tuning potential on the B58 is going to be higher. It's got a closed deck block, plenty of forged internals, and air to water intercooler.