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That,s with the softop up.....:laugh::laugh:

figures for a single-turbo 3-liter straight six mill.

However, they aren’t exactly accurate. According to results posted by the owner in the video below, the car has about 368 HP at the wheels. That means, with a transmission loss of say 10 percent, the B58 on the US models develops some 410 HP at the crank. Chip in the fact that this is an AWD dyno – for some reason – and the numbers could actually be even better. And while nobody’s really surprised by such figures, the torque numbers look even better.

BMW claims the car makes 369 lb-ft (500 Nm) at the crank. According to the dyno though, the Z4 can rely, on average, on 414 lb-ft (561 Nm) of torque. That’s a hefty increase as well. Also, if we add a transmission loss of about 10 percent, those numbers go up to about 450 lb-ft (610 Nm). Now it would be really interesting to see how the European model compares and how much power it develops.

 

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BMW regularly says lower numbers than actual. My N55 puts out 280whp and they say 300hp at the crank and that is AWD and auto so it is more like 350hp. It is now well above that.
 
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