Be part of us for an additional world first unbiased dyno (following up on our G87 M2) – with BMW’s monster G09 XM. As with a lot of BMW’s new fashions, the XM needs to be seen in individual to really recognize its presence; and there was one thing splendidly entertaining about watching it lumber onto the dyno rollers.

We had been again at Efficiency Eurowerks for the second time within the final month, this time to see what the XM has in retailer. The primary try yielded some promising returns because it was reduce quick and we had been pressured so as to add extra strapping to safe the XM onto the rollers. Sadly, the thrill was cooled only a bit as we tried to determine precisely how the hybrid system was functioning whereas in BMW’s dyno-mode. The EPower gauge did ramp up in the course of the dyno pull, however then spiked at 6500rpm which was immediately seen on the dyno graph which made us query real-world accuracy.

Our Greatest Run Pre Break-in – Dynojet 424 – Together with EPower “spike”:
IND G09 XM: 614.84hp at 6500rpm // 569.14tq at 2380rpm
IND G09 XM Crank (assuming approximate 20% loss): 768hp // 712tq

With out EPower Spike:
G09 XM — 573.49hp at 5790rpm // 516.42tq at 5790rpm
IND G09 XM Crank (assuming approximate 20% loss): 715hp // 645tq

There isn’t any method round it, the outcomes had been lower than clear. Sadly the XM was not absolutely charged which might have had an impact on the hybrid system performance on the dyno. We’re additionally undecided if BMW’s dyno-mode employs the electrical motor in a different way from its normal operation. We’re additionally not sure if permitting extra break-in miles would change the end result, so we should discover our outcomes and probably attain out to BMW for clarification.

As an apart, we did try and get the XM onto PE’s nook stability scales, however the scales had been having none of it; it is only a bit too portly which we anticipated. So we may even see a visit to a tractor trailer weigh station in our future!