02-28-2020, 10:29 AM | #1 |
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18' m550i or 18' RS5 coupe / 19' SB?
I know this is a BMW forum, but hoping for some open minded options. Any thoughts or experience with both cars? I know they are not direct competitors, but they are both fast 4wd cars. Can't decide between a low mileage high spec 18' m550i vs 18' RS5 coupe. I say coupe because I would like the RS5 SB, but it's too new on used market and more than I want to spend. I don't require 4 doors, have just 2 people 99% of the time, or I'd just take our other SUV for more space if needed. I thought maybe an S5 SB. I test drove one once and although quick, it didn't excite me and had turbo lag or transmission lag or something. I could piggy back ecu and tune TCM to about 420hp and fix the lag, but wondered if I should have got an RS car hence the coupe although less practical. The RS5 con is lack of heated steering and no leather/stitched look dash on a $85k MSRP luxury coupe which is borderline pathetic. Build quality they say is good all around. The m550i has more luxury features and materials throughout with leather dash/door tops, etc but lacks the sweet virtual cockpit and looks/prestige of rs5.
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02-29-2020, 06:45 PM | #3 |
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As you note, two completely different cars. The Audi is smaller and more nimble (sort of but remember that it is front wheel biased) but the BMW is faster, roomier, and more luxurious.
Depends upon your needs and desires. They are both good cars and as with all cars, there are plusses and minuses to each. |
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03-08-2020, 05:07 PM | #4 | |
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03-08-2020, 05:20 PM | #5 |
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My only problem with buying a used M550 is that I would always be pissed off that I didn’t get the new 523 HP version. Otherwise I’d say go with the M550. I like the Audi’s a lot, I had two A7s, but given your choices I just like the 5 series better.
BTW, I am a fan of the Audi 5’s but only at a lower price point.
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03-08-2020, 06:26 PM | #6 |
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I test drove both 2018 RS5 sport back and 2018 M550i. The RS seems to have more turbo lag, the M a bit less. I wasn't completely inspired by the Audi although the tech was a bit better. The m550 is quick and super smooth. I don't regret buying the M550i one bit!
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03-08-2020, 09:01 PM | #7 | |
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03-08-2020, 09:06 PM | #8 | |
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And the 550 does not have to be tweaked to make the M5 look better. Motor Trend dyno'd an M5 at 600 at the wheels. And I've seen credible tests on them at10.9/130 in the quarter.
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03-08-2020, 09:20 PM | #9 | ||
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03-09-2020, 12:14 AM | #10 | ||
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03-09-2020, 05:25 AM | #11 |
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I have not seen a test of an M550, but I doubt there is much difference. The cars have so much low end torque that lower gearing will have very little difference. And the only difference it would make is coming off a dead stop. Once rolling it would make no difference.
Now that I think of it, one test I have seen that tells the difference is an X5. I've seen tests with the old engine and the new in the exact same vehicle. I'll have to look them up, but I think the difference was significant, especially for what is a much heavier vehicle. My memory is that trap speed in the quarter was 4-5 mph faster.
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03-09-2020, 07:31 AM | #12 |
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Just found the X5 tests. I was a bit off.
X5 5.0 456 HP. 0-60 4.2, 1/4 mile 12.7/109 X5 M50 523 HP 0-50 3.9, 1/4 mile 12.4 112 Considering the weight and much worse aerodynamics that is still significant.
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03-09-2020, 09:00 AM | #13 |
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I love my '18 M550i. The 456 HP is plenty and the car has few faults at all. My biggest gripe is the way the stop/start works. It's not as sharp handling as a full M5 but you get a nicer ride and save big $ compared to it.
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