is It possible to put a m4 engine in a 420i x drive

Bc420i · 10-18-2019, 08:32 AM

Is it possible, or would the engine block not fit the transmission. And what other complications would there be.

Is it just a stupid question?

McLaren720s · 10-18-2019, 08:42 AM

Even if it’s possible, It would cost so much that you’d be better off selling the car and getting an M4.

PhizzurpF · 10-18-2019, 08:49 AM

Quote:

Originally Posted by Bc420i

Is it possible, or would the engine block not fit the transmission. And what other complications would there be.

Is it just a stupid question?

Why not just get an M?

HighlandPete · 10-18-2019, 08:51 AM

Quote:

Originally Posted by McLaren720s

Even if it’s possible, It would cost so much that you’d be better off selling the car and getting an M4.

Unless it is the challenge… there will be a need for many upgrades. OP will need to study the specs for gearbox, etc., to identify the required mods and understand the weak links.

Takes me back to when mates were fitting Cortina GT engines/gearboxes into the 105E Anglia.

Feddersen · 10-18-2019, 01:54 PM

Biggest issue is probably that you will not be able to keep the xDrive. Then you need all the wiring, some ECUs, the transmission, the exhaust and the LSD. Probably also parts of the suspension and parts of the drive train and the brakes.

Will it work in the end? Maybe. It’s probably easier to buy a M3 and make it look like a 320i if you want a sleeper.

Michael340i · 10-21-2019, 06:54 AM

Yes it can be done, but would be extremely difficult, and would give you a car with negligible resale value.

As others have said, just buy a M4, then you get the transmission, suspension, brakes, seats, dashboard, and it all works together. Or tune your current engine if you just want more performance.

bimmer456 · 10-21-2019, 08:49 AM

Quote:

Originally Posted by Michael340i

Yes it can be done, but would be extremely difficult, and would give you a car with negligible resale value.

As others have said, just buy a M4, then you get the transmission, suspension, brakes, seats, dashboard, and it all works together. Or tune your current engine if you just want more performance.

I think he wants an x drive with more power so tuning is the best option. Or actually since it's a 420 maybe just get a 440ix and tune that. Engine swap just seems ridiculous lol. Not sure if it's a serious question or just a curiousty on the OP. Technically anything is possible. Tuned 440ix with bootmod or even jb4 would make more power than stock M4 and give you all wheel drive grip why would you want to swap an S55 and it costs way more if you could even do it. Or maybe tune a 435ix if on a budget.

MmmmmM2 · 10-21-2019, 10:32 AM

Why?

10-18-2019, 08:32 AM	#1
Bc420i New Member 1 Rep 14 Posts Drives: BMW 420i F32 Join Date: Oct 2019 Location: England, Huddersfield iTrader: (0)	is It possible to put a m4 engine in a 420i x drive Is it possible, or would the engine block not fit the transmission. And what other complications would there be. Is it just a stupid question?
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10-18-2019, 08:42 AM	#2
McLaren720s Major 1475 Rep 1,286 Posts Drives: 2024 M4 Competition X Join Date: Jun 2019 Location: Seattle iTrader: (0)	Even if it’s possible, It would cost so much that you’d be better off selling the car and getting an M4. __________________ 2024 BMW M4 Competition XDrive - Tanzanite Blue/Kyalami Orange - AST HAS - RaceChip
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10-18-2019, 01:54 PM	#5
Feddersen Lieutenant 451 Rep 469 Posts Drives: X1 xDrive25i Join Date: Jan 2015 Location: Denmark iTrader: (0)	Biggest issue is probably that you will not be able to keep the xDrive. Then you need all the wiring, some ECUs, the transmission, the exhaust and the LSD. Probably also parts of the suspension and parts of the drive train and the brakes. Will it work in the end? Maybe. It’s probably easier to buy a M3 and make it look like a 320i if you want a sleeper. __________________ DD: F48 X1 xDrive25i '20 - https://f48.bimmerpost.com/forums/sh....php?t=1703083 For fun: F22 M240i '19 - https://www.2addicts.com/forums/show....php?t=1644646 Previous BMW: Fully loaded F30, 335i https://f30.bimmerpost.com/forums/sh....php?t=1681247
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10-21-2019, 06:54 AM	#6
Michael340i Private First Class 72 Rep 173 Posts Drives: BMW 340i Touring, Aston Martin Join Date: Mar 2019 Location: NW England iTrader: (0) Garage List 2018 BMW 340i Shado ... [0.00]	Yes it can be done, but would be extremely difficult, and would give you a car with negligible resale value. As others have said, just buy a M4, then you get the transmission, suspension, brakes, seats, dashboard, and it all works together. Or tune your current engine if you just want more performance.
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10-21-2019, 10:32 AM	#8
MmmmmM2 Colonel 2589 Rep 2,432 Posts Drives: 2021 M2C Join Date: Mar 2019 Location: Claremont, CA iTrader: (0) Garage List 2016 Mazda CX-5 [0.00] 2021 BMW M2C [0.00]	Why?
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