Europe got a bad deal (originally).
Here's the good news: the BMW Z4 M40i sold in America produces a very healthy 382 horsepower and 369 lb-ft of torque from its 3.0-liter turbocharged inline-six engine. This is not the case in Europe. As we reported months ago, because Europe switched to a new and stricter emissions testing procedure, the Worldwide Harmonized Light Vehicle Test Procedure (WLTP), BMW was forced to lower the Z4 M40i's output to meet the restrictions. That means the Euro-spec Z4 M40i produces 342 hp, a difference of 40 ponies compared to its American counterpart.
Needless to say, European customers were not exactly pleased. However, there is potentially a glimmer of hope. Zero2Turbo.com claims "a trusted source" said BMW will soon be upgrading the Z4 M40i's output to 382 hp. What's changed?
Apparently there was a recent drag race in Europe between the Z4 M40i and the Toyota Supra when it was discovered the latter produces more power than initially claimed. Given that both sports cars share basic underpinnings, engine, and, gearbox, BMW was not exactly pleased when word of this got back to Munich. The source further adds that the more powerful engine will be available starting in December. The Z4's 0-62 mph time will also drop from 4.6 seconds to 4.1 seconds.
Again, this is all a rumor for now and BMW has yet to confirm anything. Given that this affects European customers only, it's understandable that Americans may not care all that much. But it is worth noting that automakers do pay attention to automotive media test drives and comparisons. In this case, because its top-of-the-line Z4 came across as weak next to its coupe cousin, BMW may have realized this is simply unacceptable.