BMW's new inline 6's are insane. The S5/RS5 really need a power bump
12-13-2019, 10:26 AM
#121
We recently purchased a X3 M40i and the car is a Beast... the B58 engine is a Gem, so smooooth, all the way to Redline. My friend who owns a Macan GTS drove it and is so jealous of the powertrain.
02-01-2020, 08:38 AM
#122
I plead guilty. Would never do this if a third party soul present.
It was a two lanes road with no traffic or even a squarrel except a stubborn GLC43 stuck in the left one. Speed was not excessive, I passed him on the right. He "reacted". Some stupid hormones kicked in in both of us and we both smashed it.
The S5 didn't disappoint but it took *everything*. There were some stops. I knew that the 5-60mph (acceleration from idle) on my car isn't the best (try 5.8s, within a tick of my Acura TLX V6) and the Mercedes was likely quicker (I verified - try 5.5s), so the stops were very "brief"..
At the end, even if both vehicles have very similar weight but the Merc has more HP, my car prevailed but it made me remember this thread....
+20-30 HP would be nice, but the 7-speed S-Tronic transmission found in the A6 could help.
https://www.caranddriver.com/reviews...k-test-review/
https://www.caranddriver.com/reviews...mparison-test/
It was a two lanes road with no traffic or even a squarrel except a stubborn GLC43 stuck in the left one. Speed was not excessive, I passed him on the right. He "reacted". Some stupid hormones kicked in in both of us and we both smashed it.
The S5 didn't disappoint but it took *everything*. There were some stops. I knew that the 5-60mph (acceleration from idle) on my car isn't the best (try 5.8s, within a tick of my Acura TLX V6) and the Mercedes was likely quicker (I verified - try 5.5s), so the stops were very "brief"..
At the end, even if both vehicles have very similar weight but the Merc has more HP, my car prevailed but it made me remember this thread....
+20-30 HP would be nice, but the 7-speed S-Tronic transmission found in the A6 could help.
https://www.caranddriver.com/reviews...k-test-review/
https://www.caranddriver.com/reviews...mparison-test/
Last edited by BlakeV; 02-01-2020 at 08:45 AM.
02-01-2020, 10:42 AM
#123
AudiWorld Super User
The S5 didn't disappoint but it took *everything*. There were some stops. I knew that the 5-60mph (acceleration from idle) on my car isn't the best (try 5.8s, within a tick of my Acura TLX V6) and the Mercedes was likely quicker (I verified - try 5.5s), so the stops were very "brief"..
/
/
Last edited by JD15; 02-01-2020 at 10:44 AM.
02-01-2020, 09:21 PM
#124
AudiWorld Senior Member
02-02-2020, 03:23 AM
#125
AudiWorld Member
That C&D 5-60 time for the S5 has always been suspiciously slow. The S5 has the same 0-60 time as the GLC43 (obviously launch and traction off the line are major factors), a slightly faster 1/4 time, 3 mph higher 1/4 mile trap speed, but 0.3s slower 5-60 time. The TLX isn't even close to the S5 in most measures, with more than 1s slower 1/4 mile time and 8 mph slower trap speed. The A5 SB is also only 0.3s slower in the 5-60 measure, but again is over 1s slower in the 1/4 mile with 8 mph lower trap speed. I wonder if the AT shifts too lackadaisically when it is not brake torqued prior to launch.
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Slides (02-02-2020)
02-02-2020, 05:50 AM
#127
AudiWorld Super User
I wonder if the lackluster 5-60 time has to do with the S5 starting at 5mph in 2nd gear and not kicking down. The C&D procedure leaves the car in auto. I have read the S5 seems to want to start in 2nd gear a lot. I wouldn’t be surprised if that is part of the reason for that time.
02-02-2020, 06:40 AM
#128
AudiWorld Super User
On torque and HP:
It's not just the peak torque number that matters. It's how much and how long torque can be sustained along an engine's rev band.
If an engine has a "peaky" engine it could have a peak torque of 300lb ft, but it only hits that peak for 200rpm, and has a steep climb off idle to peak and then a sharp drop to red line.
That engine wouldn't feel and perform as powerfully as an engine that has a peak torque of 280lb ft. but achieves 80% of that from 400rpm off idle and sustains that torque for 3000rpm, hits the peak at 4500rpm and then slowly levels off to 80% again to near red line.
An engine that can produce a good amount/percentage of its power along a wide rev range will move a vehicle from standing start to high speed more quickly compared to a peaky engine that produces a higher peak torque, but for a very short duration.
Of course, proper trans gearing is what transfers that power to the wheels, and the tires ability to grip the road surface is what puts the power into motion.
Torque is force, and "Horse Power" is calculated from Torque.
Here's a good read for anyone interested in torque and HP:
Power and Torque: Understanding the Relationship Between the Two, by EPI Inc.
It's not just the peak torque number that matters. It's how much and how long torque can be sustained along an engine's rev band.
If an engine has a "peaky" engine it could have a peak torque of 300lb ft, but it only hits that peak for 200rpm, and has a steep climb off idle to peak and then a sharp drop to red line.
That engine wouldn't feel and perform as powerfully as an engine that has a peak torque of 280lb ft. but achieves 80% of that from 400rpm off idle and sustains that torque for 3000rpm, hits the peak at 4500rpm and then slowly levels off to 80% again to near red line.
An engine that can produce a good amount/percentage of its power along a wide rev range will move a vehicle from standing start to high speed more quickly compared to a peaky engine that produces a higher peak torque, but for a very short duration.
Of course, proper trans gearing is what transfers that power to the wheels, and the tires ability to grip the road surface is what puts the power into motion.
Torque is force, and "Horse Power" is calculated from Torque.
Here's a good read for anyone interested in torque and HP:
Power and Torque: Understanding the Relationship Between the Two, by EPI Inc.
because nothing is transmitted to the ground without that. It’s what makes the torque, the torque
02-02-2020, 07:52 PM
#129
AudiWorld Senior Member
I'll move in a heartbeat to the M340i if it means no more Audi lag.
02-03-2020, 06:43 AM
#130
AudiWorld Senior Member
