Someone claims to have a dyno graph showing a nonvanos 540 makes equal power up to 5k rpm asthe m5.
Plz jump in and point out whats true and what isnt here.
The dyno is about how they perform up to 5k rpms and the truth is not too far off from that post - the 540i and the m5, on a dyno, look very very similar up to 5000 rpms. That is why a 540i with an m5-equivalent rear diff gearing feels almost identical from a butt dyno perspective.
I don't know why this is a surprise to anyone...despite having an extra half liter of displacement, the s62 is setup to be a bit more of a high horsepower screamer. The ITBs and alot of the other differences between the m62 and s62 are about responsiveness and agility of the engine, but that doesn't show up on a dyno.
There is a fine case to be made about why some people should own a 540i instead of an m5, depending on their needs. I fit the bill, given the amount of driving I do. However, I wanted everything the m5 had to offer in addition to the engine.
So I say, no, ,this isn't put to bed, it's pretty close to reality. Don't forget too that the 540i has a modest, but meaningful, weight advantage as well.
it's an anemic M5 if it is one, at all. where's the torque graph?
314whp compared to 261hp (@ their peaks) doesn't quite add up.
Agree, that is the by far the healthiest 540 and the unhealthiest M5 engine outputs I have ever seen.
Stock 540 is 282. So using the 15% drivetrain loss as we use for the M5, that puts PEAK rwhp at about 240, vs most M5's about 325-330. So the 540 is overstated by 20 rwhp and the M5 is understated by 20 rwhp at maximum. A 40 rwhp difference.
I recognize the shape of the hp curve may be different and the 540 runs closer to the M5 below about 4500- 5000 rpm, but the numbers are still a bit off.
Depending on year 540 is rated as much as 298hp even though all vanos are identical. Maybe it was a software update? The 540 factory press numbers are generally considered low because they typically run 260 at the wheels in stock form.
For the youtube comparison comment, i figured he meant find a youtube of them drag racing which is far more likely to be posted than dyno runs.
14Likes
Linear Mode
