Cadillac CTS-V Forum banner

BMW i4 M50 - Fat and Furious

1511 Views 10 Replies 5 Participants Last post by  m13s
Hi guys!

BMW does this marketing roadshow every year that they call the "Driving Experience Tour". They bring along 10 or so BMW models for street test drives, and pick one special model for a parking lot autocross. This year the autocross diva was the i4 M50, BMW's new electric vehicle based on the 4-series hatchback.

My full thoughts on the i4 M50 are here, but I thought I'd share some of my takeaways here. It was an eye-opening experience about the pros and cons of building an EV off of an internal-combustion platform.

Pros:
  • The i4 M50 looks nearly identical to a 4-series, which means it is very pretty from 3 out of 4 sides. 馃槀 There's no wacko EV styling to turn you off of the i4.
  • The i4 M50 is very powerful with 536hp and 586 lb-ft. In EV fashion, it launches as hard.
  • Like a V2 CTS-V, the i4 M50 has a good balance of ride quality and body control. It never hides its considerable weight, but it handles its heft well.

Cons:
  • Making an EV out of a gas-car platform resulted in huge weight, and also packaging bloopers like a floor with a transmission tunnel bump in a car with no transmission.
  • The curb weight is 5018 lbs! The i4 M50 may accelerate with fury, but it's undeniably fat!
  • Those poor front tires, they have so much work to do in the corners.
  • The i4 M50 may be as powerful as an M3, but it doesn't have sports car reflexes. There's no extraordinary agility in the i4 M50, and it lacks trick LSDs.

I'd hoped that BMW would use some M magic on the i4 M50 it make it dance like an M car, but really the i4 M50 moves like other powerful EVs. It overachieves in a straight line and underachieves in the corners.

Best!
Mike


See less See more
3
1 - 11 of 11 Posts
I should go to one of those events and have fun with the people that put it on.
  • Like
Reactions: 1
I should go to one of those events and have fun with the people that put it on.
Do you mean at the autocross? The instructors are all ex-racing drivers...maybe they'd get along well with you!
I'd hoped that BMW would use some M magic on the i4 M50 it make it dance like an M car, but really the i4 M50 moves like other powerful EVs. It overachieves in a straight line and underachieves in the corners.
Unless or until someone invents "Inertial Dampeners" like they have on Star Trek, there is simply no overcoming the mass of all those batteries.

Barring a revolution in battery technology that delivers energy density equivalent to gasoline (or similar chemical), electric cars are always going to be heavier than their internal combustion siblings, and that additional weight is going to work against them in the corners.
Hi guys!

BMW does this marketing roadshow every year that they call the "Driving Experience Tour". They bring along 10 or so BMW models for street test drives, and pick one special model for a parking lot autocross. This year the autocross diva was the i4 M50, BMW's new electric vehicle based on the 4-series hatchback.

My full thoughts on the i4 M50 are here, but I thought I'd share some of my takeaways here. It was an eye-opening experience about the pros and cons of building an EV off of an internal-combustion platform.

Pros:
  • The i4 M50 looks nearly identical to a 4-series, which means it is very pretty from 3 out of 4 sides. 馃槀 There's no wacko EV styling to turn you off of the i4.
  • The i4 M50 is very powerful with 536hp and 586 lb-ft. In EV fashion, it launches as hard.
  • Like a V2 CTS-V, the i4 M50 has a good balance of ride quality and body control. It never hides its considerable weight, but it handles its heft well.

Cons:
  • Making an EV out of a gas-car platform resulted in huge weight, and also packaging bloopers like a floor with a transmission tunnel bump in a car with no transmission.
  • The curb weight is 5018 lbs! The i4 M50 may accelerate with fury, but it's undeniably fat!
  • Those poor front tires, they have so much work to do in the corners.
  • The i4 M50 may be as powerful as an M3, but it doesn't have sports car reflexes. There's no extraordinary agility in the i4 M50, and it lacks trick LSDs.

I'd hoped that BMW would use some M magic on the i4 M50 it make it dance like an M car, but really the i4 M50 moves like other powerful EVs. It overachieves in a straight line and underachieves in the corners.

Best!
Mike


Why have a grill?
  • Like
Reactions: 1
Why have a grill?
How else would you recognize it as a BMW? :ROFLMAO:

Curiously, while the top 75% of the grill is sealed closed, the bottom 25% takes in air. I don't know what, if anything, the in flow of air is cooling. (In BMW's iX SUV the grill is 100% sealed.)
Then bring back the kidney beans!


Sent from my iPhone using Tapatalk
The batteries generate a significant amount of heat during discharge. And if they get too hot, they burst in to what is known as a "highly energetic exothermic chemical runaway reaction". 500HP is 373KW. If the car's battery system runs at 800V, the batteries have to deliver 466 Amps. Resistive heating is going to be somewhere around 22KW. So the equivalent of 10x of your wife/girlfriend/boyfriend (I don't judge) blow dryers going all at once (but without the noise). The cars pump coolant around the battery pack (including the electronic speed control for the motor(s)), and motor, and they need a radiator to get rid of that heat. It's not nearly as much heat as an internal combustion engine would generate for the same power output, so the radiators and openings can be quite a bit smaller. But they still need radiators.
See less See more
  • Helpful
Reactions: 1
Do you mean at the autocross? The instructors are all ex-racing drivers...maybe they'd get along well with you!
Auto x is not racing.
  • Like
Reactions: 1
Also worth noting, for at least some cars, in cold weather they can use the cooling system to heat the battery. Lithium battery performance falls off rapidly below freezing. At low enough temperatures, a fully charged Lithium battery might not deliver any current at all.

For this reason, electric cars are an execrably bad idea for very cold climates.
1 - 11 of 11 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top